MongoDB Changelog

What's new in MongoDB 4.0.2

Aug 29, 2018

Issues fixed:
SERVER-35720: Allow zones to be created on non-existent collection
SERVER-35441: drop/dropDatabase does not cleanup config.tags
SERVER-36102: Create initial chunks on appropriate shards for zoned sharding
SERVER-36070: Aggregation with $out results in error when Auditing is enabled
SERVER-34846: Covered index with collated field returns incorrect result when collation not involved in match or sort
SERVER-34664: Commands that are unsupported in a transaction should error

New in MongoDB 4.0.1 (Aug 6, 2018)

Security:
SERVER-35125 null pointer read access violation in SSLHandshakeManager::doServerHandshake
SERVER-36027 Enterprise build does not recognize the –redactClientLogData flag
Sharding:
SERVER-33237 Optimize the Range Deleter speed
SERVER-33697 Provide sanity check on number of cached sessions
SERVER-34897 Introduce parameter to control whether MongoS should automatically retry failed find commands
SERVER-35609 Create initial chunk on primaryShard if only writing one chunk
SERVER-35632 Blacklist lagged_config_secondary.js and all_config_servers_blackholed_from_mongos.js from RHEL 6.7 s390x variants
SERVER-35691 Make all code paths returning StaleConfig error go through the StaleConfigInfo serializer
SERVER-35711 Remove unused anonymous function getPersistedMaxDbVersion() from shard server catalog cache loader
SERVER-35745 _getNextSessionMods doesn’t include oplogReplay flag to query new oplog created during migration
SERVER-35938 NamespaceSerializer lock should be used for database as well as collection during createCollection
SERVER-35997 Await replication on config server after shardCollection in safe secondary reads tests
SERVER-36041 Increase the size of changelog and actionlog
SERVER-36075 Add comment to shard_identity_rollback.js explaining why we set the FCV to 4.0 on the shardsvr
SERVER-36132 Invariant that chunk migration is actually reflected in the metadata after successful commit
SERVER-36232 Refresh after chunk migration commit may not see the committed metadata
Replication:
SERVER-32088 ChangeStream resumeAfter does not work on sharded collections if not all shards have chunks for the collection
SERVER-34414 Creating a role with buildsIndexes:false node hits an fassert
SERVER-34758 replSetGetStatus can deadlock with initialSyncer
SERVER-35124 Stepdown suites with MMAP V1 often fail due to flushing mmaps taking long time
SERVER-35200 Speed up failure detection in the OplogFetcher during steady state replication
SERVER-35388 Improve misleading error messages for aggregation stages banned in transactions
SERVER-35488 ReplSetTest.waitForState() should ensure node has finished closing connections
SERVER-35571 Wait until all nodes become stable before checkOplogs
SERVER-35991 Turn off chaining in set_feature_compatibility_version.js
SERVER-35992 Secondary should have no vote in SecondaryReadsTest
Query:
SERVER-34789 Using resume token from an ‘invalidate’ notification with ‘resumeAfter’ should error
SERVER-34933 pcre verb support
SERVER-35693 Parsing of $in takes quadratic time due to O(n^2) boost::flat_set constructor
SERVER-35751 Make kill_own_ops.js more robust
SERVER-35851 Consider checking whether the array passed to $in is already sorted before calling std::sort
SERVER-35929 Possible use-after-free when reloading the view catalog due to an invalidation
Aggregation:
SERVER-35028 Add change stream notifications for collection drop and rename
SERVER-35029 Add change stream notification for database drop
SERVER-35084 change_stream_enforce_max_time_ms_on_mongos.js expects getMore to schedule follow-up getMores
SERVER-35634 view_catalog_cycle_lookup.js should not always assert that finds on views will succeed
SERVER-35961 Remove uninitialized count variable in MapReduce command
Catalog:
SERVER-35563 The UUIDCatalog onCreateCollection observer should atomically unregister and re-register catalog entries
Storage:
SERVER-32509 Mobile SE: Implement error reporting for unsupported startup options
SERVER-32997 Mobile SE: Design and implement multi-reader or single-writer concurrency
SERVER-33605 Mobile SE: Disable capped collections
SERVER-33651 Mobile SE: Use full synchronous mode for SQLite writes
SERVER-34002 readConcern_snapshot.js should wait for writes to be majority-committed on secondaries before reading
SERVER-34113 Remove all support for snapshot reads outside of multi-document transactions
SERVER-34129 Don’t hold database or collection locks during oplog truncation
SERVER-34579 Do not populate indexDetails for mobile storage engine
SERVER-34713 Progressively declining dropDatabase performance
SERVER-35085 repair can cause spurious NamespaceNotFound errors with concurrent initial sync operations
SERVER-35317 restartCatalog problematically discards minVisibleSnapshot data
SERVER-35398 Mobile SE: Remove code for capped collection
SERVER-35671 DatabaseHolderImpl::closeAll can leave catalog in an incomplete state
SERVER-35704 Tag readConcern_snapshot.js with ‘uses_transactions’
SERVER-35789 check for index catalog isready mismatch for multi-doc txns
SERVER-35859 Disable rocksdb buildvariant
SERVER-35994 Reduce CPU load in secondary_reads_unique_indexes.js test
SERVER-36006 multiInitialSyncApply should consider setting a read timestamp of kNoTimestamp
SERVER-36025 RestartCatalogCommand can attempt to reinitialize oplog pointers on standalones
SERVER-36167 Add pretty printer for WT flags members
GridFS:
SERVER-35361 filemd5 command fails to safely clean up PlanExecutor after manual yield
Operations:
SERVER-27264 With net.ssl.allowConnectionsWithoutCertificates: true, allow disabling no client certificate log warnings
SERVER-32064 A logical session id should be included in all command requests from the mongo shell
SERVER-34160 Mongo client run buffered command when terminated.
SERVER-35758 Mongo shell prompt errors when running transactions after overriding “db”
SERVER-35903 Free monitoring doesn’t allow disabling from the shell without enabling it first
SERVER-36010 Change log messages for Windows stacktraces to use error() or severe() rather than log()
SERVER-36088 Replica set connection strings trigger access violation on 4.0 shell + Windows
Build and Packaging:
SERVER-33000 Platform Support: add Ubuntu 18.04
SERVER-33996 Don’t apply self signing until after bundling the SDK.
SERVER-35600 Add support for armv7-k
SERVER-35901 Add toolchain path to lint task
SERVER-36039 Support LibreSSL 2.7 on FreeBSD
SERVER-36082 Don’t link getShardMap command into embedded
Tools:
TOOLS-2058 mongoreplay does not show OP_MSG commands
TOOLS-2062 Support zlib compression in mongoreplay
TOOLS-2075 mongoreplay always replays to secondary
Internals:
SERVER-33817 Powercycle test using kill mongod
SERVER-34563 Connect via SRV record fails if the returned record resides in subdomain
SERVER-34793 Add call to BF suggestion server on failed task completion
SERVER-34810 Session cache refresh can erroneously kill cursors that are still in use
SERVER-34956 big_object1.js is not resilient to unexpected stepdowns
SERVER-34984 Update major_version_upgrade.js test to call setFCV to the latest FCV
SERVER-34996 Save console_output & console_screenshot from aws_ec2.py as artifacts in evergreen.yml
SERVER-35101 Handle differently a badly formed bindIp argument
SERVER-35165 Disable and re-enable update_test_lifecycle Evergreen task on the 4.0 branch
SERVER-35188 Typo in ServiceLiason* types
SERVER-35263 Add FSM workloads for testing atomicity and isolation of updates inside a transaction across multiple collections and databases
SERVER-35312 Update system_perf.yml and perf.yml to compare to 3.6.5 baseline for master and 4.0
SERVER-35313 CleanupConcurrencyWorkloads resmoke hook needs to handle the balancer
SERVER-35383 Increase electionTimeoutMillis for the ContinuousStepdown hook used in stepdown suites
SERVER-35389 Remove dead code from old FSM suite
SERVER-35506 The Powercycle wait_for_mongod_shutdown function should ensure the mongod process is no longer running
SERVER-35523 FSMWorkloadTestCase erroneously sets TestData.sameDB=true and TestData.sameCollection=true
SERVER-35550 Bridge should not block listener while making outbound connections
SERVER-35578 Switch package tests to new package testing VPC
SERVER-35588 powertest.py should call replSetReconfigure command only after successful replSetGetConfig
SERVER-35627 Repair should re-create missing collection data files from the existing metadata
SERVER-35664 Run the android embedded tests on api24 system images
SERVER-35668 Avoid moving concurrency tests to small instances on arm64
SERVER-35675 find_by_uuid_and_rename.js should not fail from QueryPlanKilled when yielding during a collection rename
SERVER-35692 Add support to an optional re-registration bool in metrics response
SERVER-35702 Stop running the agg and update fuzzer on macOS
SERVER-35724 Remote EC2 hosts which are not accessible via ssh should fail with system error
SERVER-35727 make the embedded sdk compile task in to a multi-task task group.
SERVER-35834 Fix compile errors in dns_name_test on Microsoft compilers
SERVER-35850 Update filename suffix to v4.0-latest for nightly builds
SERVER-35858 Error in call BF Suggestion service
SERVER-35908 Shutdown service entry point in mongoed before shutting down embedded
SERVER-35990 Update evergreen_task_timeout.py REQUIRED_BUILD_VARIANTS list
SERVER-35993 read_concern_uninitiated_set restarts nodes so must not allow ephemeral storage
SERVER-36055 Mobile SE: Compact returns wrong error code on mobile
SERVER-36144 want to add an empty cloud_nightly.yml file
TOOLS-1991 Build tools with Go 1.10.1
WT-3839 Document the undefined behavior when a range truncate overlaps with inserts
WT-3917 Enhance WT_CURSOR::reserve documentation around commit visibility
WT-4024 Fix a race between split and next/prev
WT-4048 Generalize timing_stress_for_test split functionality
WT-4067 Enhance LSM to not pin as much history in cache
WT-4101 Don’t abort the eviction server during session verify when oldest_timestamp is held back
WT-4111 Improve checkpoint scrubbing algorithm
WT-4125 Ensure that subsequent checkpoints with stable timestamp don’t read too much
WT-4133 Coverity 1393445, 1393446 Dereference before null check
WT-4136 Add a new timing stress flag that yields during tree search
WT-4138 Add an option to timeout waiting for space in the cache
WT-4139 rename the cursor restart statistic to match implementation
WT-4140 Cursor walk limits quick eviction page selection unnecessarily.
WT-4141 Enhance checkpoint with timestamps to unblock eviction sooner
WT-4143 Use WiredTiger.turtle.set if it exists but WiredTiger.turtle does not
WT-4145 Only include the checkpoint timestamp during checkpoints
WT-4146 Coverity 1393639, unused variable
WT-4152 Save return value for later comparison in transaction code

New in MongoDB 3.6.5 (May 25, 2018)

New in MongoDB 3.6.3 (Feb 26, 2018)

Security:
SERVER-31893 Explicitly define timeout for synchronous LDAP calls
SERVER-32086 Suppress LDAP user cache invalidation log message by default
SERVER-32779 Upgrade third_party tomcrypt to 1.18.1 final
SERVER-32933 Allow mongod to start when unable to reach LDAP server
Sharding:
SERVER-27724 Explore whether we can further minimize chunk metadata reloads on shards
SERVER-28923 Add diagnosability and supportability features for retryable writes
SERVER-29423 Sharding balancer may schedule multiple migrations with the same source or destination
SERVER-30152 add safe secondary reads targeted tests for mapReduce
SERVER-30671 Don’t expect operationTime to not change in causal_consistency_shell_support.js
SERVER-31860 setFCV on a cluster can fail to call setFCV on shards if the config server primary’s ShardRegistry is empty
SERVER-31979 Chunk migration statistics are not recorded in the moveChunk.commit changelog entries
SERVER-32235 Blacklist core/drop3.js test from causally consistent workloadss
SERVER-32368 do not perform UUID check against a shard’s config cache in the sharding_csrs_continuous_config_stepdown_WT suite
SERVER-32554 Source shard stepdown while entering critical section can trigger cloner invariant
SERVER-32568 The migration_sets_fromMigrate_flag.js test is not compatible with sharding continuous stepdown suite
SERVER-32569 Introduce uniform way to allow config servers and shard replica sets to start in non-cluster mode
SERVER-32592 Stepdown during migration cleanup can crash the source shard primary
SERVER-32593 CSRS stepdown during migration commit can trigger fassert on source shard primary
SERVER-32886 Unnecessary sleeps during chunk migration
SERVER-32901 Pull the CollectionShardingState map out of ShardingState
SERVER-32924 tag skip_sharding_configuration_checks test with requires_persistence tag
SERVER-32970 Put back random chunk size initialization in mongos auto split tracking
SERVER-33234 dropIndexes on mongos should ignore IndexNotFound from individual shards if some shard returned success
Replication:
SERVER-21456 Improve closing connection behavior when stepping down from primary
SERVER-28290 stepping down due to a higher term seen in a heartbeat should not discard term after stepdown
SERVER-28895 Remove old form of replSetUpdatePosition command
SERVER-31707 Test changeStreams on a sharded collection where the shard doesn’t know the collection is sharded
SERVER-32028 Make reconfig() in rslib.js resilient to NodeNotFound error
SERVER-32209 Reset the in-memory optimes on PV downgrade and upgrade
SERVER-32361 Rollback tests that expect a fatal assertion after node restart should not wait for connection
SERVER-32402 dropDatabase after step down can cause fassert
SERVER-32432 Race condition causes seg fault in ReplicationCoordinatorExternalStateImpl shutdown
SERVER-32532 Two-phase dropDatabase may not replicate all collection drops before the database drop.
SERVER-32556 Retryable write on local db hits an invariant
SERVER-32564 Increase assert.soon timeout when waiting for election in rollback_crud_op_sequences.js
SERVER-32624 dropDatabase() should wait for collection drops using ReplicationCoordinator::awaitReplication() instead of awaitReplicationOfLastOpForClient()
SERVER-32783 CollectionCloner::shutdown() should not block on resetting _verifyCollectionDroppedScheduler
SERVER-32794 Make timeouts unrelated to elections not depend on election timeout
SERVER-32803 stepup.js should retry replSetStepUp command when it is overtaking another primary
SERVER-32840 Remove pv0 jepsen tests
SERVER-32919 initial_sync_many_dbs.js should use less data
Query:
SERVER-28260 Create a killAnyCursor privilege
SERVER-31484 Operation deadline and awaitData timeout should be separate
SERVER-31854 After the first drop, assertSchemaMatch() should assert that subsequent drops succeed
SERVER-32441 3.6 mongod crash on find with index and nested $and/$or
SERVER-32492 idhack_sharded.js should use _waitForDelete:true in moveChunk
SERVER-32606 Tailing oplog on secondary fails with CappedPositionLost
SERVER-33005 Contained $or access planning is incorrect for $elemMatch object, results in invariant failure
SERVER-33089 Unable to start queryable mongod because it failed to regenerate index for admin.system.users
SERVER-33092 elemMatchProjection.js incorrectly assumes that shell generates monotonically increasing _id values
SERVER-33333 Prevent failed cross user getMores from having side effects
Aggregation:
SERVER-31760 Lookup sub-pipeline is not using index for equality match
SERVER-32349 Resuming a sharded change stream when there are multiple changes with the same timestamp may be impossible
SERVER-32690 Aggregation can trip invariant related to renamed fields optimization
Storage:
SERVER-32259 Improve error handling for fetchTypeAndSourceURI()
SERVER-32274 Do not timestamp applyOps writes on standalones
SERVER-32533 In oplog truncate with WT, don’t use a start key
SERVER-32573 Skip wt_delayed_secondary_read_concern_majority.js when running with WiredTiger’s LSM tree
SERVER-32637 Ensure that upgrading to 3.6 when on pv0 doesn’t break if you don’t explicitly turn off readConcernMajority
SERVER-32851 setFeatureCompatibilityVersion can race with createCollection such that FCV 3.6 is set and some collections do not have UUIDs
Operations:
SERVER-32072 DBRef with NumberInt ID changing to float in the shell
SERVER-32473 Error loading history file on first shell usage
SERVER-33140 mongodb+srv URI support broken on shell v3.6.2 for Windows
Build and Packaging:
SERVER-32516 Fails to compile with Boost 1.66
SERVER-32580 Microbenchmarks: update the enterprise branch for mongo v3.6
SERVER-32649 got “used vector type where scalar is required” when using GCC 7
SERVER-32932 When testing SLES 12 packages make sure required repos exist
SERVER-33181 Upgrade ASIO to latest
Internals:
SERVER-21630 Expand resmoke’s CheckReplDBHash support to config servers and sharded replica sets
SERVER-28396 resmoke.py’s logkeeper client should respect size limit for POST requests by splitting them up
SERVER-28822 Improve DBConnectionPool’s growth semantics
SERVER-31636 Split up generational_jstestfuzz* Evergeen tasks into query_fuzzer and update_fuzzer tasks
SERVER-31670 Change replica set fixture used by replica_sets_jscore_passthrough to make its secondary have zero votes
SERVER-31768 Don’t create the first collection chunk on a primary drained shard
SERVER-31886 Powercycle tasks running on Windows
SERVER-31935 Archive process of interest core dumps from remote EC2 instance
SERVER-31942 Large changes in unreliable tests can prevent test lifecycle update
SERVER-32060 Move MMAPv1 powercycle tasks to MMAPv1 specific variants
SERVER-32071 Powercycle - use internal crash
SERVER-32074 Powercycle - Add stack dump when SIGUSR1 or Windows event is received
SERVER-32090 Powercycle - pymongo client args are overwritten
SERVER-32107 Update DNS root nameservers for DNS Query test
SERVER-32110 Powercycle remote host not accessible in Evergreen timeout phase
SERVER-32161 MongoDB 3.2+ fails to compile on PPC64LE with glibc 2.26+
SERVER-32169 A cursor created with a session cannot be killed outside that session
SERVER-32197 Remote host is missing the debug symbols for hang_analyzer in evergreen.yml
SERVER-32203 Log the remote EC2 instance status when a failure to access it is detected in evergreen.yml
SERVER-32205 Dropping admin db sets FCV to 3.4 but leaves UUIDs
SERVER-32222 change_streams_primary_shard_unaware.js needs to be marked as requiring persistence
SERVER-32228 Powercycle - handle remote host restarts
SERVER-32243 Add an option to have the validate hook skip some collections.
SERVER-32260 Call workload_setup.py from mongo repo
SERVER-32298 Add a background system task to periodically copy remote statistics in evergreen.yml
SERVER-32299 Add disk statistics for remote EC2 instances
SERVER-32376 Blacklist tests that manually call startSession in the retryable_writes_jscore_stepdown_passthrough suite
SERVER-32403 Increase remote EC2 expire time to 3 hours
SERVER-32410 Validate User::CredentialData before attempting to perform authentication
SERVER-32414 Remove stale stdx:: requirements from lint.
SERVER-32429 black list regex_targeting.js from step down suites
SERVER-32468 Use a 1-node CSRS in non-stepdown sharding passthroughs tests
SERVER-32475 Microbenchmarks on v3.6 use master version of enterprise module
SERVER-32486 Windows builds of the shell should report the failing domain name in DNS lookup failures
SERVER-32515 Powercycle - rsync file exclude list
SERVER-32520 Add VPC support for launching AWS EC2 instances
SERVER-32522 set_read_and_write_concerns.js treats mapReduce “out” field like aggregation’s $out stage
SERVER-32527 Update package tests to use new BUILD2 VPC
SERVER-32541 Disable Powercycle MMAPv1 task
SERVER-32551 Cluster with x.509 membership authentication serves client connection with cluster client certificate
SERVER-32585 Remove unnecessary dependencies from requirements.txt for ese_WT tests
SERVER-32609 update_test_lifecycle fails when a test group does not have historical data
SERVER-32614 update_test_lifecycle may fail because datetime.strptime() is not thread safe
SERVER-32631 specifying –bind_ip localhost results in error “address already in use”
SERVER-32664 Sys-perf enable running baselines at lower priority
SERVER-32680 Update perf projects to use newer baselines
SERVER-32691 Create passthrough for w=”majority” with 2-node replica set to address lost test coverage
SERVER-32704 sys-perf: Skip validating oplog as enabled by SERVER-32243
SERVER-32740 Set bootstrap.ycsb_dir and bootstrap.workloads_dir in system_perf.yml
SERVER-32766 net.bindIpAll with net.ipv6 fails with “listen: Address already in use, terminating”
SERVER-32772 dbtest task in Evergreen should write to task directory
SERVER-32774 Ensure change_streams_secondary_reads suite has voting secondaries
SERVER-32788 Update “secondary performance” sysperf test to use nonvoting secondaries
SERVER-32806 retried findAndModify not using oplogHack when querying for pre/post image oplog entry
SERVER-32891 Sys-perf change order of mongodb_setup and workload_setup calls
SERVER-32896 Upload dsi-artifacts.yml in system_perf.yml
SERVER-32925 sys-perf 3.6 should run the change stream tests
SERVER-32987 Move the contents of the ‘uuid’ library to be under ‘base’
SERVER-33068 run_check_repl_dbhash.js hook exits without actually running dbhash on a replica set
SERVER-33142 Experiment with disabling cluster reuse in system_perf.yml
SERVER-33147 Limit the -j/num_jobs_available for high core ARM CI servers
SERVER-33158 Logical Session refresh batches are too large
SERVER-33219 Add a backpressure mechanism to the CRUD client in backup_restore*.js tests
SERVER-33236 Update perf.yml to use ssh form of git clone
WT-2705 High throughput cache bound many threaded workloads can experience long latencies
WT-3074 Automate a test to stress eviction walk with many active trees
WT-3133 Detect or track long latency operations
WT-3295 Allow LSM to merge into custom data sources
WT-3565 Test and understand mixed timestamp/no-timestamp usage to same data
WT-3587 Remove HAVE_VERBOSE conditional compilation
WT-3597 Add a diagnostic check for updates to the same key out of timestamp order
WT-3632 Increase how granularly cache usage settings can be configured
WT-3654 Fix warning in Windows build on evergreen
WT-3695 format failed to report a stuck cache
WT-3716 Restore the WT_VERB_TEMPORARY verbose flag.
WT-3720 flags macros cast flags to unsigned values, hiding warnings.
WT-3725 Add statistics to locks around timestamp structures
WT-3732 Handle adding WT indices while cursors on the table are open
WT-3734 Fix undefined behavior in verbose output
WT-3738 Review internal session allocation accounting
WT-3740 race in page dirty-byte decrement.
WT-3750 Fast-path fs_directory_list of a single file.
WT-3753 Building on Windows –enable-java
WT-3766 Lookaside sweep for obsolete updates
WT-3767 Avoid lookaside instantiation for faster reads
WT-3768 Lookaside optimization: birthmarks
WT-3769 Fix a bug in reverse cursor walks with particular delete patterns and prefix compression enabled
WT-3772 Hot backup causes uncontrolled growth of WiredTigerPreplog files
WT-3774 Enhance Python lookaside testing to cover cursor modify
WT-3775 Improve commit timestamp is older than oldest timestamp error message
WT-3779 Add support for string formats with WT_CURSOR::modify
WT-3780 Improve error messages on invalid WT_CURSOR::modify usage
WT-3783 Fix transaction isolation to use the correct enum
WT-3787 test_compact02 failed as compaction halted due to eviction pressure
WT-3790 Switch statistics to rdtsc from epoch calls
WT-3792 LSM version 1 metadata incompatibility
WT-3793 WiredTiger page debug dump functions should unpack integer keys
WT-3794 Coverity 1383547 and lint
WT-3795 lint cleanups for the op-tracking software, reduce record write size.
WT-3796 Report a better error message if transaction commit fails
WT-3799 Test/format with timestamps enabled pin cache full
WT-3806 Make sure rdtsc values move forward in time
WT-3807 clang static analysis updates
WT-3809 Fix a bug in lookaside related to birthmarks
WT-3810 wt_rdtsc calibration needs to be longer and verify validity
WT-3811 Add basic ability to visualise operation tracking
WT-3812 debugging page output should handle complex key/value items.
WT-3816 Enable prefix compression on the lookaside table
WT-3818 __rec_txn_read() code order cleanup
WT-3819 clang static analysis improvements
WT-3820 Add a WT_SESSION.breakpoint method for Python debugging.
WT-3822 Update WiredTiger copyrights to 2018
WT-3824 tsc_nsec_ratio can compute to zero and cause divide by zero bug
WT-3825 Fix calculation of CPU ticks per unit time
WT-3826 random-abort test failure
WT-3827 test_compact02 failure
WT-3828 Link error on OS/X for __wt_process data reference
WT-3831 uninitialized buffer value in statlog server path comparison
WT-3832 Fixup shell script warning messages
WT-3833 test/format cache_minimum value error
WT-3835 cursor remove tries to return a key that doesn’t exist
WT-3840 Dump more information when data corruption is encountered
WT-3841 Fix error message pattern in timestamp09
WT-3842 full-build Friday & lint
WT-3844 Checkpoints can hang on limbo pages
WT-3845 Compiler warning in examples using GCC 5.4.0
WT-3846 Refine operation tracking visualization tool
WT-3847 Add a stub API for prepared transaction
WT-3852 Update debugging when committing at an earlier timestamp
WT-3853 LSM version 1 metadata incompatibility
WT-3854 Remove write lock from commit path, leaving old entries in queue
WT-3860 lint

New in MongoDB 3.6.2 (Jan 11, 2018)

Security:
SERVER-31625 The contents of {USER} needs to be escaped when querying for the groups using LDAP server
Sharding:
SERVER-28992 Cleanup mongos write commands execution
SERVER-31982 Shard does not call config commit chunk migration command with majority writeConcern nor checks for writeConcern errors.
SERVER-32202 Do not clear the cached sharding filtering information on replication state changes
SERVER-32255 UUIDs may be absent from shard secondary local collections
SERVER-32480 Remove CatalogCache retrieval methods, which take StringData
SERVER-32529 Requiring replSet for shards breaks Queryable Backup
Replication:
SERVER-30626 Remove TopologyCoordinator interface
SERVER-31267 CollectionCloner fails if collection is dropped between getMore calls
SERVER-31684 QueryPlanKilled (operation exceeded time limit) in $changeStream with updateLookup
SERVER-31749 Clarify the reason temporary unique collection names are made
SERVER-32098 Disallow operations on drop-pending collections through applyOps
SERVER-32136 initial_sync_drop_collection.js should wait for system to stablize after restarting node
SERVER-32224 Disable chaining in initial_sync_drop_collection.js
Aggregation:
SERVER-32282 Aggregation text search returns text score even if it wasn’t requested when targeting multiple shards in a sharded cluster
SERVER-32430 DocumentSourceSort sorts array documents incorrectly if there is a non-simple collation
Storage:
SERVER-29909 Libraries db/db_raii and db/s/sharding are directly cyclic
SERVER-31750 Always log renameCollections in our tests
SERVER-32242 Fix race in CompatibleFirstStress lock manager test
SERVER-32315 Remove IndexObserver
Operations:
SERVER-32396 mongo shell failed to connect with 3.6 connection string SRV
Build and Packaging:
SERVER-31875 Fix long link times on OS X by passing -no_deduplicate to the linker
SERVER-32415 MongoDB msi installer for Compass contains a typo
Internals:
SERVER-30538 check that oplogTruncateAfterPoint is correct in PeriodicKillSecondaries hook
SERVER-31972 Reduce the number of iterations for the toggle_feature_compatibility.js workload
SERVER-31997 Add additional unittesting for CompatibleFirst policy
SERVER-32091 Powercycle - remove mongod.lock file for MMAPV1 test
SERVER-32145 Avoid dropping lock before cleaning up DocumentSourceCursor’s PlanExecutor
SERVER-32246 PID file permission on v3.6 make it not not monitorable using pid file
SERVER-32497 implicitly_retry_on_database_drop_pending.js calls tojson() inside of a loop
SERVER-32500 Disable the sharding Evergreen task on the Enterprise OS X 10.10 MMAPv1 builder

New in MongoDB 3.6.1 (Dec 28, 2017)

New in MongoDB 3.6.0 (Dec 5, 2017)

New in MongoDB 3.4.10 (Oct 28, 2017)

Security:
SERVER-25855 Increase more timeouts in mongos_cache_invalidation.js
SERVER-28727 mongoldap should not print each acquired role’s database inline
Sharding:
SERVER-29932 add asserts to mapReduce_inSharded_outSharded.js
SERVER-30825 blacklist shard_existing_coll_chunk_count.js from the continuous config stepdown suite
SERVER-31049 View with collation doesn’t work as expected in sharded cluster
SERVER-31091 The config server balancer stop command does not obey maxTimeMS
SERVER-31111 Add assert.commandWorked to migrateBig_balancer.js
SERVER-31204 Calling shardCollection after enableSharding may fail if executed against different mongos
Replication:
SERVER-29772 Provide option to 3.2 and 3.4 to allow initial sync to complete even when it encounters renameCollection entries
SERVER-30830 applyOps should return NamespaceNotFound when applying a CRUD operation on a non-existent collection/database
SERVER-30840 extend timeout in replsets/index_delete.js (3.4 only)
SERVER-30842 Don’t try to set last optime for client backwards after rollback
SERVER-31467 Blacklist initial_sync_rename_collection_unsafe.js from 3.2 initial sync variant
Query:
SERVER-31139 mongod fatal error after issuing $text index find containing nested non-text fields as the index prefix
SERVER-31366 profile_getmore.js does not tolerate killCursors command
JavaScript:
SERVER-29651 Interrupt signal is ignored when received inside certain functions.
SERVER-30362 JavaScript DBCollection.toString() stops working
SERVER-30502 –disableJavaScriptJIT does not disable JIT
Storage:
SERVER-15723 Avoid G_X lock for rename_collection within database
SERVER-28637 wiredtiger journal files accumulate with each server start/stop
SERVER-30927 Use readConcern afterClusterTime for initsync oplog queries
SERVER-31403 Disable mongo-rocks variant on v3.2 and v3.4
Operations:
SERVER-19076 printShardingStatus/sh.status should pass a decent indent to tojson() for shard keys
SERVER-28821 MozJS ASAN integration should not invariant that all memory was freed
SERVER-30361 mongod.conf bindIp option accept bogus parameters
SERVER-30769 Mongo shell throws ‘exception during autocomplete’
SERVER-31176 mongo shell should use stderr for password prompt
Build and Packaging:
SERVER-23516 Using apt-get update chowns user to mongodb
SERVER-30166 Use of string instead of std::string in some source files prevents compilation
SERVER-30558 Remove Solaris builds from master
SERVER-31197 building.md GCC version requirement out-of-date
SERVER-31338 RHEL compile task failing in drivers nightly 3.4 branch
Internals:
SERVER-21933 Update README
SERVER-29087 system-perf.yml needs to be changed to use the new name for the timeseries html file
SERVER-29287 Upgrade pcre to 8.41
SERVER-29524 sys-perf: Call infrastructure_provisioning.py instead of infrastructure_provisioning.sh
SERVER-29565 Remove sys-perf compare tasks
SERVER-30045 Debug symbols for unittest binaries are not uploaded on non-GDB platforms
SERVER-30117 FeatureCompatibilityVersion::onInsertOrUpdate should only write to the server parameter on commit
SERVER-30241 Attach workloads html to evergreen task
SERVER-30891 perf.yml: make the -repl variants run frequently
SERVER-30938 Enable ycsb-wmajority tests in system_perf.yml
SERVER-31006 Use the latest release of curator on all branches
SERVER-31108 Update baseline tag for microbenchmarks
SERVER-31271 don’t use nspr allocator for js threads for better ASAN
SERVER-31273 Use Source/Sink version of snappy functions
SERVER-31427 Disable stepback for Enterprise SLES 11/12 and Ubuntu1604 s390x
SERVER-31527 Rebaseline sys-perf after adjusting tests (3.4.9 and 3.2.17)
WT-3263 Allow archive on restart/recovery if clean shutdown
WT-3264 Permanent change to disable logging should eventually remove all logs
WT-3284 tree-walk restart bug
WT-3308 Add statistics tracking around yield loops
WT-3351 Recovery assertion failure: old_lognum < lognum
WT-3406 Reconciliation is choosing reserved records for writing.
WT-3461 Avoid long sleeps when the system clock is adjusted
WT-3470 Avoid a metadata cursor open for table open/drop
WT-3533 eviction handle walk can race with handle re-open
WT-3590 Keep data consistent if writes fail during a clean shutdown

New in MongoDB 3.4.9 (Sep 12, 2017)

Sharding:
SERVER-20392 Sharding an existing small collection results in large number of chunks
SERVER-30183 a moveChunk that joins the active moveChunk on a shard may not respect its waitForDelete
SERVER-30487 RangeDeleter holds WT transaction open while waiting for majority
SERVER-30636 RangeDeleter assert failed because of replication lag
Replication:
SERVER-28277 Need to increase timeout in read_committed_with_catalog_changes.js
SERVER-29802 Non-atomic applyOps command should not take out a global exclusive lock
SERVER-30554 relax locking mode in applyOps when applying CRUD-only ops non-atomically
Query:
SERVER-30189 Reduce calls to allocator for large $in expressions
Write Operations:
SERVER-27317 Inserting a document with a Decimal128 value when featureCompatibilityVersion is 3.2 results in a closed socket
JavaScript:
SERVER-30875 Add support for a “no-owned bson” mode for JS Scopes
SERVER-30971 Use of “scope” field in mapReduce triggers BSONObj ownership error
Storage:
SERVER-26239 Improve handling of WT_CACHE_FULL for inMemory storage engine
SERVER-30490 Compile RocksDB with USE_RTTI=1
SERVER-30790 ServerStatus on WiredTiger accesses the storage engine without any locks
Build and Packaging:
SERVER-29686 Remove /var/lib/mongodb from mongodb-org[-unstable] deb metapackage
SERVER-30562 avoid running many duplicate ARM64 tests for the community build
Internals:
SERVER-26377 Skip running FSM workloads that use the compact command on the LSM build variant
SERVER-26824 Skip FSM workloads which rely on nUpserted or nRemoved when Balancer is enabled
SERVER-28824 Unhandled hang analyzer exception escapes loop to get threads from each process
SERVER-29431 initialsync.js does not verify that initial sync succeeds
SERVER-29714 Add Exception Message to Validate_Locale.cpp
SERVER-30509 Update Evergreen API URL in burn_in_tests.py
SERVER-30643 Performance regression with SSL
WT-3329 With a uniform workload and a number of small collections, eviction does a poor job of selecting candidates for eviction.
WT-3438 Don’t tune eviction thread count when the count is fixed
WT-3499 Checkpoint can miss not yet committed item

New in MongoDB 3.5.12 Dev (Sep 8, 2017)

New Feature: SERVER-1243: New operator to update all matching items in an array
New Feature: SERVER-831: Positional Operator Matching Nested Arrays
Bug: SERVER-25059: URL support needs to support percent-encoding (escape sequences)
New Feature: SERVER-27089: Extend the update subsystem to support more expressive updates to array fields
Task: SERVER-30503: Redesign Moose storage structure
New Feature: SERVER-30564: Run embedded CAPI and transport layer tests in iOS simulator on evergreen
Bug: SERVER-30502: --disableJavaScriptJIT does not disable JIT
Bug: SERVER-20392: Sharding an existing small collection results in large number of chunks
Task: SERVER-29096: Set readPreference to secondary in causally_consistent_jscore_passthrough suite
Task: SERVER-29140: Return 'invalidate' entries and close the cursor on relevant drop, dropDatabase, and renameCollection oplog entries
Task: SERVER-29131: Support resumeAfter option to $changeNotication to control where to start returning notifications from, which always errors if no entry with the given resumeToken exists
Task: SERVER-29144: Filter out notifications from oplogEntries with 'fromMigrate":true
Task: SERVER-29203: Implement the SessionsCollection for sharded clusters
Task: SERVER-29202: Implement the SessionsCollection for replica sets
Task: SERVER-28964: Ensure OP_MSG handlers abandon connections in error cases required by the spec
Task: SERVER-28772: Create PushNode/PushAllNode
Task: SERVER-28793: Create primary mode unit tests for ShardServerCatalogCacheLoader once all the pieces are committed
Task: SERVER-28777: Always parse update expression as an UpdateNode tree when featureCompatibilityVersion=3.6
Bug: SERVER-28824: Unhandled hang analyzer exception escapes loop to get threads from each process
Improvement: SERVER-28648: Unittests should work if 'localhost' canonicalizes to other hostname
Bug: SERVER-29337: jstests/sharding/linearizable_read_concern.js should wait for shardIdentity to replicate to all secondaries before issuing secondary reads
Improvement: SERVER-29429: Pick a sane default for maxConnecting in sharding task executor
Improvement: SERVER-29422: Respect version.json in Evergreen patch builds
Task: SERVER-29502: Require the vote from the current primary in the election dry-run of catchup takeover
Task: SERVER-28510: Make Ingress and Egress networking layer support fire and forget over OP_MSG
Task: SERVER-28301: Add stats about the session record cache to the serverStatus command
New Feature: SERVER-28335: Implement the refreshSessions command
New Feature: SERVER-28338: Implement the killSessions command
Task: SERVER-28388: Improve lifetime handling of diagnosticMessage from LDAP operations
Improvement: SERVER-13061: Raise write batch limit to 100,000 ops and prevent oversized errors
Task: SERVER-13362: Need better messaging in BSONElement::chk() errors
Improvement: SERVER-24897: Configure Diffie-Hellman parameters for OpenSSL
Bug: SERVER-25855: Increase more timeouts in mongos_cache_invalidation.js
Improvement: SERVER-19541: Add option to resmoke.py to connect to an existing deployment
Task: SERVER-30566: Unwind SERVER-28190
Improvement: SERVER-30565: burn_in_tests.py shouldn't cause compile task to fail
Task: SERVER-30562: avoid running many duplicate ARM64 tests for the community build
Improvement: SERVER-30560: Support IDL serialization to OpMsgRequest document sequences
Improvement: SERVER-30558: Remove Solaris builds from master
Task: SERVER-30555: Roll Back to Checkpoint: drop the local.replset.checkpointTimestamp collection when we shut down in fCV 3.4
Improvement: SERVER-30554: relax locking mode in applyOps when applying CRUD-only ops non-atomically
Task: SERVER-30549: Ignore shardVersion on shard secondaries until 3.6 feature compatibility version is set
Bug: SERVER-30601: Coverity analysis defect 101964: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Bug: SERVER-30589: Don't add stable timestamp candidates when in master slave mode
Bug: SERVER-30584: Sessions collection should not send refresh if there are no records
Bug: SERVER-30571: EphemeralForTest oplogStartHack segfaults if startingPosition is behind oplog
Task: SERVER-30593: Add 'available' as a valid read concern level
Task: SERVER-30588: Support binding all IPs associated with a hostname
Task: SERVER-30580: Unify implementations of Status and DBException
Bug: SERVER-30570: Coverity analysis defect 101918: PW.PARAMETER_HIDDEN
Bug: SERVER-30569: Coverity analysis defect 101928: Arguments in wrong order
Bug: SERVER-30574: remote_operations.py fails to handle ssh_options, quoting in operations and Windows files
Task: SERVER-30541: Roll Back to Checkpoint: Remove "rollback " log message prefixes
Improvement: SERVER-30536: disallow applyOps non-atomic mode when preCondition flag is used
Improvement: SERVER-30535: Consistent names for ServiceExecutorAdaptive metrics
Task: SERVER-30534: Create a _configsvrDropCollection command
Bug: SERVER-30528: createIndexes should ignore NamespaceNotFound uasserts during InitialSync
Task: SERVER-30743: Remove shell functions used for now obsoleted db.upgradeCheck()
Bug: SERVER-30720: Integer overflow in SharedBuffer::grow_reallocate
Task: SERVER-30521: in syncApply, throw NamespaceNotFound rather than returning a status on missing database
Improvement: SERVER-30520: SecureRandom::create() should return a unique_ptr
Bug: SERVER-30524: dateFromParts expects "milliseconds" instead of "millisecond"
Task: SERVER-30516: Reduce concurrency for Windows compile_all builds to avoid OOM failures
Task: SERVER-30512: Ensure all changeStreams field names match the spec
Task: SERVER-30509: Update Evergreen API URL in burn_in_tests.py
Task: SERVER-30506: Rename $changeNotification to $changeStreams
Improvement: SERVER-30507: Python git module should not use the '--work-tree' option
Task: SERVER-30501: Create rollback logging component
Bug: SERVER-30499: Only update sessions with a transaction number
Bug: SERVER-30500: don't assign UUIDs to system.indexes on collMod/upgrade
Bug: SERVER-30495: Remove erroneous percent sign in test lifecycle update JIRA issues
Bug: SERVER-30625: Reconnect node after calling waitForState shell helper in case the state transition closes connections
Bug: SERVER-30616: fix race in AbstractOplogFetcherTest::OplogFetcherReturnsOperationFailedIfExecutorFailsToScheduleFind
Improvement: SERVER-30619: Update Evergreen API URL in buildscripts/test_failures.py
Task: SERVER-30604: Mount EC2 instance drive for /data
Bug: SERVER-30627: Avoid network errors in restartServerReplication() in catchup takeover JS tests.
Bug: SERVER-30614: missing_key.js should check its inserts and commands
Bug: SERVER-30673: get last error command should be marked doesn't requireAuth
Improvement: SERVER-30670: Add clusterType TestData to generational fuzzer yml tests.
Improvement: SERVER-30651: Parallelize calls to the Evergreen API in update_test_lifecycle.py
Bug: SERVER-30703: make _configsvrShardCollection return the newly sharded collection's UUID
Bug: SERVER-30698: make the distinct command deterministically versioned on mongos for sharded collections
Bug: SERVER-30661: Build with --wiredtiger=off fails on master branch
Task: SERVER-30658: Add DBLevelLocking check to storage engine API
Improvement: SERVER-30646: Fix dbCheck health log entries
Bug: SERVER-30712: ClusterAggregate::aggPassthrough() should pass RetryPolicy::kIdempotent to handle transient network/failover errors
Task: SERVER-30706: Create specializations of AtomicWord that are lock-free for eligible user define dtypes
Bug: SERVER-30688: Using multiple changeStream cursors causes a segfault
Task: SERVER-30702: Stop printing stack traces in masserts
Bug: SERVER-30665: applyOps collMod handling should only allow nonexistent UUIDs for UUID upgrade collMods
Improvement: SERVER-30654: Add retry mechanism for failed API calls in test_failures module
Bug: SERVER-30648: Set GlobalLockAcquisitionTracker after we waitForLock
Bug: SERVER-30490: Compile RocksDB with USE_RTTI=1
Improvement: SERVER-30480: Update aggregation explain format to provide details of merge location
Task: SERVER-30479: Make async builder run daily
Bug: SERVER-30473: Denial of service from wild
Bug: SERVER-30362: JavaScript DBCollection.toString() stops working
Task: SERVER-30328: Have WT encryption at rest allow multiple wiredtiger_open/close calls in a single mongod process lifetime.
Bug: SERVER-30295: Connect FCV to WiredTiger compatibility version
Bug: SERVER-30234: Create embedded CAPI tests for CRUD operations
Improvement: SERVER-30230: Detailed error message when mongod fails to start to because systemLog.path points to a directory
Improvement: SERVER-30351: Add a traverseRecordStore() function in the RecordStoreValidateAdaptor
Task: SERVER-30319: When requesting only 1 thread for initial sync, use the 'find' command instead of 'parallelCollectionScan'
Improvement: SERVER-30302: Add explicit configuration object for UpdateSequenceGenerator
Task: SERVER-30335: Roll Back to Checkpoint: Call setInitialDataTimestamp at startup
Improvement: SERVER-30301: Add explicit configuration object for DocumentStructureEnumerator
Improvement: SERVER-30378: Add asynchronous writing facility
Improvement: SERVER-30379: Add health log
Improvement: SERVER-30353: Create an index observer to notify us of changes made to index and document keys
Improvement: SERVER-30352: Add a new class that will keep track of the index inconsistencies during validation
New Feature: SERVER-30327: Introduce ScalarGenerator interface for creating values of different BSON types in idempotency testing
Task: SERVER-30324: Move logic of removeShard to _configsvrRemoveShard
Task: SERVER-30310: Have WiredTigerKVEngine implement StorageEngine::setStableTimestamp/setInitialDataTimestamp
Task: SERVER-30081: Add a WiredTigerKVEngine "recovery" method that reconciles the _mdb_catalog and WT tables.
Task: SERVER-30046: Add support for $expr constant expressions to ComparisonMatchExpression
Bug: SERVER-29990: OP_MSG with duplicate field '$logicalTime'
Bug: SERVER-30057: Remove $logicalTime from core/set_param1.js test
Bug: SERVER-30040: ServiceStateMachine should redact exceptions before logging
Task: SERVER-30034: Create a $_internalSchemaMatchArrayElement MatchExpression
Task: SERVER-30076: Use the UUID of the config.transactions collection for rollback via refetch
Task: SERVER-29987: Make all non-write operations take readConcern
Bug: SERVER-30269: Bump ASIO to capture bug fixes
Improvement: SERVER-30265: Abstract enabling virtualenv in etc/evergreen.yml
Bug: SERVER-30266: ShardServerCatalogCacheLoader may drop collections causing failures in test validation
Task: SERVER-30281: Properly clear in-memory transaction table state after rollback
Bug: SERVER-30289: Ensure parallel shell in change_notification.js has started before running getMore it will wait for
Improvement: SERVER-30254: Make ThreadPool::join finish remaining tasks on a pristine thread instead of inline
Bug: SERVER-30183: a moveChunk that joins the active moveChunk on a shard may not respect its waitForDelete
Improvement: SERVER-30189: Reduce calls to allocator for large $in expressions
Task: SERVER-30175: Extend the JSON Schema parser to handle restriction keywords for scalars
Task: SERVER-29939: Update sequence generation for testing oplog idempotency
Task: SERVER-29944: Implement a basic idempotency checker for testing oplog idempotency
Bug: SERVER-29915: SCRAM-SHA-1 mechanism should respect "y" in gs2-cbind-flag
Task: SERVER-29893: Roll Back to Checkpoint: Rename recovery code and make it accessible to both startup and rollback
Task: SERVER-29898: Roll Back to Checkpoint: Call recoverToStableTimestamp() under the global X lock
Task: SERVER-29897: Roll Back to Checkpoint: Increment the rollback ID
Task: SERVER-29894: Roll Back to Checkpoint: Start oplog application during recovery at checkpoint timestamp
Task: SERVER-29891: Roll Back to Checkpoint: Call setStableTimestamp() when commit point or last applied changes
Task: SERVER-29896: Roll Back to Checkpoint: Write the common point to the oplog truncate after point
Improvement: SERVER-29802: Non-atomic applyOps command should not take out a global exclusive lock
Task: SERVER-29797: Capability to invoke Hang_analyzer on a remote host
Bug: SERVER-29768: Primary does not need to do a complete chunk metadata read in ShardServerCatalogCacheLoader
Improvement: SERVER-29743: IDL should generate a default constructor
Task: SERVER-29756: Unit tests for OpMsg parsing and serialization
Improvement: SERVER-30468: Speed up checking for duplicate error codes
Bug: SERVER-30380: $lookup 'let' variables should be available to all nested sub-pipelines
Bug: SERVER-30467: Extend $_internalSchemaMinLength and $_internalSchemaMaxLength to count lengths of Unicode strings
Task: SERVER-30437: Stop the shard chunk loader from scheduling persistence tasks with mixed version chunks
Bug: SERVER-30424: Coverity analysis defect 101903: Dereference before null check
Task: SERVER-30443: Create PeriodicBalancerSettingsRefresher on the ServiceContext
Task: SERVER-30432: add logicalSessionTimeoutMinutes to isMaster results
Task: SERVER-30407: Make findAndModify retryable
Bug: SERVER-30445: A non-full validation should also return the number of invalid documents/objects
Bug: SERVER-30418: continuous stepdown override should catch the ManualInterventionRequired error code for mapReduce in addition to shardCollection
Improvement: SERVER-30401: Simplify UpdateLeafNode::apply interface
Bug: SERVER-30394: ftdc file_manager generates an incorrect absolute diagnostic data path for mongos if the logpath is a relative path
Improvement: SERVER-29672: Move the CatalogCacheLoader out of the CatalogCache and make it an independent component
Bug: SERVER-29694: Read-only shards should not try to persist the collection routing information locally
Bug: SERVER-29686: Remove /var/lib/mongodb from mongodb-org[-unstable] deb metapackage
Task: SERVER-29667: Fix document refetch step in UUID enabled rollback
Bug: SERVER-29641: checkReplicatedDataHashes() throws a TypeError when replSetTest uses mongobridge
Improvement: SERVER-29670: Create a server parameter for specifying the level of CollectionCloner parallelization
Task: SERVER-29637: make shards obtain UUID for sharded collections from config server on setFeatureCompatibilityVersion: 3.6
Task: SERVER-30147: Add collection task queue flush functionality to ShardServerCatalogCacheLoader and replace certain uses of waitForCollectionVersion
Task: SERVER-30146: Evergreen scripts for remote hosts: ssh & scp
Task: SERVER-30122: Evergreen functions to spawn and terminate EC2 instances
Task: SERVER-29586: Create a $_internalSchemaAllElemMatchFromIndex MatchExpression
Improvement: SERVER-29617: Use the AsyncResultsMerger to copy documents in CollectionCloner instead of Fetcher
Improvement: SERVER-29524: sys-perf: Call infrastructure_provisioning.py instead of infrastructure_provisioning.sh
Task: SERVER-29593: Integrate the official JSON Schema test corpus into the unit tests
Improvement: SERVER-22760: Sharded aggregation pipelines which involve taking a simple union should merge on mongos
Bug: SERVER-27738: Positional operator ($) can choose wrong array element when there is a numerical path component
Bug: SERVER-27411: session cache concurrency issues at shutdown
Bug: SERVER-27826: Increase the timeout SSLTest.prototype.connectWorked from 30 to 600 seconds.
New Feature: SERVER-20782: Support causal consistency with secondary reads in sharded, replicated MongoDB clusters
Bug: SERVER-22829: WiredTiger data files world-readable
Improvement: SERVER-24550: Error out when db.createUser() is used with wrong syntax
Bug: SERVER-30531: nonexistent tests blacklisted
Bug: SERVER-30630: Remote hang_analyzer invoked during timeout phase even when the task doesn't have remote processes
Improvement: SERVER-30350: Move the RecordStoreValidateAdaptor into its own file from CollectionImpl
Improvement: SERVER-30299: MSVC outputs warning 'Call to 'std::copy' with parameters that may be unsafe' in unordered_fast_key_table.h
Improvement: SERVER-29974: Comment in checkAuthForRenameCollectionCommand doesn't match behavior
Improvement: SERVER-30453: Remove the record_store_validate_adaptor library and move its source into the catalog library
Bug: SERVER-30529: serviceExecutorTaskStats totaltimeExecutingMicros should be totalTimeExecutingMicros
Bug: SERVER-30527: serviceExecutorTaskStats tasksExecutng should be tasksExecuting
Task: SERVER-30721: Remove uses of CIDRException in favor of uassert()

New in MongoDB 3.4.7 (Aug 8, 2017)

New in MongoDB 3.2.10 (Oct 7, 2016)

Issues fixed:
SERVER-25974: When WT cache utilization is full, application threads can stall for an extended period of time.
SERVER-20306: MongoDB with WiredTiger may experience excessive memory fragmentation, leading to swapping and/or out-of-memory errors.
SERVER-16801: When updating a field of one numerical type to the same number of different numerical type, update operation considers it as a noop.
Sharding:
SERVER-23598 Race in config.version intialization
SERVER-25516 Add setParameter option to 3.2 to prevent the replica set monitor from ever giving up on monitoring a set
SERVER-25527 Send the version of the chunk being moved as part of the shard moveChunk and splitChunk commands
SERVER-25574 Remove jstest/core/hashtest.1js
SERVER-25602 splitChunk command with out of bound splitKeys fails, but still updates the chunks
Replication:
SERVER-22136 Attach term metadata to UpdatePosition command
SERVER-24254 Wait for nodes to agree on primary in maxSyncSourceLagSecs.js and chaining_removal.js
SERVER-24926 replset8.js should call ReplSetTest.awaitReplication() to be consistent with comment in test.
SERVER-25946 increase failover limit in election_timing.js
Query:
SERVER-24320 Planner can attempt to use invalid index when using plan cache due to plan cache key / MatchExpression sorting inconsistency
SERVER-24901 rollback5.js should not depend on size storer value to get collection size
SERVER-25443 Remove Linux (Decimal Enabled) test variant
SERVER-25951 MongoDB 3.2: Report additional metrics in getMore slowms logging
Write Operations:
SERVER-16801 update considers a change in numerical type to be a noop
Aggregation:
SERVER-25039 Aggregation can attempt to re-plan after collection has been dropped
JavaScript:
SERVER-25056 ImplScope should check interruptability against an opctx
WiredTiger:
WT-2863 Support UTF-8 paths on Windows
WT-2865 eviction thread error failure
WT-2026 Maximum pages size at eviction too large
WT-2221 Document which statistics are available via a “fast” configuration vs. an “all” configuration
WT-2233 Investigate changing when the eviction server switches to aggressive mode.
WT-2239 Make sure LSM cursors read up to date dsk_gen, it was racing with compact
WT-2323 Allocate a transaction id at the beginning of join cursor iteration
WT-2843 Fix a bug in recovery if there is no filesystem truncate support
WT-2846 Several bugs related to reconfiguring eviction server at runtime
WT-2353 Failure to create async threads as part of a wiredtiger_open call will cause a hang
WT-2380 Make scripts fail if code doesn’t match style
WT-2486 Update make check so that it runs faster
WT-2555 make format run on Windows
WT-2578 remove write barriers from the TAILQ_INSERT_XXX macros
WT-2631 nullptr is passed for parameters marked with attribute non-null
WT-2638 ftruncate may not be supported
WT-2645 wt dump: push the complexity of collecting metadata into a dump cursor
WT-2648 cache-line alignment for new ports
WT-2665 Limit allocator fragmentation in WiredTiger
WT-2678 The metadata should not imply that an empty value is true
WT-2688 configure –enable-python doesn’t check for availability of swig
WT-2693 Check open_cursor error paths for consistent handling
WT-2695 Integrate s390x accelerated crc32c support
WT-2719 add fuzz testing for WiredTiger options and reconfiguration.
WT-2728 Don’t re-read log file headers during log_flush
WT-2731 Raw compression can create pages that are larger than expected
WT-2732 Coverity analysis defect 99665: Redundant test
WT-2734 Improve documentation of eviction behavior
WT-2737 Scrub dirty pages rather than evicting them
WT-2738 Remove the ability to change the default checkpoint name
WT-2739 pluggable file systems documentation cleanups
WT-2743 Thread count statistics always report 0
WT-2744 partial line even with line buffering set
WT-2746 track checkpoint I/O separately from eviction I/O
WT-2751 column-store statistics incorrectly calculates the number of entries
WT-2752 Fixes to zipfian wtperf workload config
WT-2755 flexelint configuration treats size_t as 4B type
WT-2756 Upgrade the autoconf archive package to check for swig 3.0
WT-2757 Column tables behave differently when column names are provided
WT-2759 Releasing the hot-backup lock doesn’t require the schema lock.
WT-2762 wtstats tool fails if checkpoint runs
WT-2763 Unit test test_intpack failing on OSX
WT-2764 Optimize checkpoints to reduce throughput disruption
WT-2765 wt dump: indices need to be shown in the dump output
WT-2766 Don’t count eviction of lookaside file pages for the purpose of checking stuck cache
WT-2767 test suite needs way to run an individual scenario
WT-2769 Update documentation to reflect correct limits of memory_page_max
WT-2770 Add statistics tracking schema operations
WT-2772 Investigate log performance testing weirdness
WT-2773 search_near in indexes does not find exact matches
WT-2774 minor cleanups/improvements
WT-2778 Python test suite: make scenario initialization consistent
WT-2779 Raw compression created unexpectedly large pages on disk
WT-2781 Enhance bulk cursor option with an option to return immediately on contention
WT-2782 Missing a fs_directory_list_free in ex_file_system.c
WT-2783 wtperf multi-btree.wtperf dumps core on Mac
WT-2785 Scrub dirty pages rather than evicting them: single-page reconciliation
WT-2787 Include src/include/wiredtiger_ext.h is problematic
WT-2788 Java: freed memory overwrite during handle close can cause JNI crash
WT-2791 Enhance OS X Evergreen unit test
WT-2793 wtperf config improvements
WT-2795 Update documentation around read-only configuration
WT-2796 Memory leak in reconciliation uncovered by stress testing
WT-2800 Illegal file format in test/format on PPC
WT-2801 Crash vulnerability from eviction of metadata during checkpoint
WT-2803 Add verbose functionality to WT Evergreen tests
WT-2804 Don’t read values in a tree without a snapshot
WT-2805 Infinite recursion if error streams fail
WT-2806 wtperf allocation size off-by-one
WT-2807 Switch Jenkins performance tests to tcmalloc
WT-2811 Reconciliation asserts that transaction time has gone backwards
WT-2812 Error when reconfiguring cache targets
WT-2813 small cache usage stuck even with large cache
WT-2814 Enhance wtperf to support single-op truncate mode
WT-2816 Improve WiredTiger eviction performance
WT-2817 Investigate performance regression in develop, add workload to wtperf/runners
WT-2818 The page visibility check when queuing pages for eviction is overly restrictive
WT-2820 add gcc warn_unused_result attribute
WT-2822 panic mutex and other functions that cannot fail
WT-2823 support file handles without a truncate method
WT-2824 wtperf displays connection and table create configurations twice
WT-2826 clang38 false positive on uninitialized variable.
WT-2827 checkpoint log_size configuration improvements
WT-2828 Make long wtperf tests reflect mongoDB usage
WT-2829 Switch automated testing to use enable-strict configure option
WT-2832 Python test uses hard-coded temporary directory
WT-2834 Join cursor: discrepancy with bloom filters
WT-2835 WT_CONNECTION.leak-memory can skip memory map and cache cleanup
WT-2838 Don’t free session handles on close if leak memory is configured
WT-2839 lint: Ignoring return value of function
WT-2840 clang analysis: garbage values
WT-2841 Jenkins Valgrind runner is reporting errors in test wt2719_reconfig
WT-2847 Merge fair locks into read/write locks.
WT-2850 clang 4.1 attribute warnings when building
WT-2853 Multi threaded reader writer example shows temporary slowdown or lockup
WT-2857 POSIX ftruncate calls should be #ifdef’d HAVE_FTRUNCATE
WT-2862 Fix lint error in test case for forced eviction with multiple cursors
WT-2866 Eviction server algorithm tuning
WT-2867 Review and fix barrier usage in __lsm_tree_close
WT-2868 Add sample_interval to checkpoint-stress wtperf config
WT-2869 Performance regression on secondaries
WT-2870 Rename wtperf checkpoint schema jobs
WT-2871 __wt_verbose has the wrong GCC format attributes
WT-2872 Recent stuck cache test/stress failures.
WT-2873 Refactor CRC32 code
WT-2875 Test test_wt2853_perf can run too long under valgrind
WT-2876 Extend wtperf to support a log like table
WT-2878 Verbose changes affected performance
WT-2881 Add -Wpedantic to clang compiler warning flags
WT-2883 wiredtiger_open with verbose=handleops recursive loop
WT-2885 __wt_checkpoint_signal lint
WT-2886 Decide how in-memory configuration and eviction_dirty_target interact
WT-2888 Switch functions to return void where possible
WT-2892 hot backup can race with block truncate
WT-2896 Coverity #1362535: resource leak
WT-2897 Checkpoints can become corrupted on failure
WT-2901 Add option to disable checkpoint dirty stepdown phase
WT-1162 Add latency to Jenkins wtperf tests and plots
SERVER-25843 Coverity analysis defect 99856: Redundant test
SERVER-25845 Coverity analysis defect 99859: Explicit null dereferenced
SERVER-25846 Coverity analysis defect 99861: Dereference after null check
GridFS:
SERVER-25451 gridfs.js should shard sharded_files_id_n.fs.chunks with key {files_id: 1, n: 1} and unique=true
Operations:
SERVER-22491 replace db.serverStatus().uptimeEstimate test in dbadmin.js with C++ test
SERVER-25080 MongoDB 3.2.8 ignores ulimit in systemd distributions
SERVER-25478 Use wtimeout in sh.setBalancerState
Build and Packaging:
SERVER-12048 Calling “service mongod start” with mongod running prevents “service mongod stop” from working
SERVER-19986 clang-format.py lint fails in mci if files were deleted
SERVER-24885 The systemd MaxTasks feature can prevent mongod from accepting new connections
SERVER-25594 update to latest curator build for repo publishing
SERVER-25786 Remove buildscripts/update-vendor-wiredtier
SERVER-25793 update curator for s3 improvements
SERVER-25815 Remove Ubuntu 14.10 build from v3.2 and v3.0 branch
SERVER-25908 Simplify repo.mongodb.(com|org) repository layout.
Tools:
TOOLS-1035 Don’t create intents for system.profile.metadata.json files
TOOLS-1140 tools do not respect readPreference=secondary when connecting to a mongos
TOOLS-1223 Mongodump SSL and GSSAPI authentication
TOOLS-1268 No numeric version in –version output
TOOLS-1277 Backport to v3.2
TOOLS-1365 Issue only one ApplyOps cmd per oplog entry
Internals:
SERVER-22150 multiversion download script should use new feeds rather than dl.mongodb.org
SERVER-22368 Parameterize branch in etc/perf.yml
SERVER-22496 Add aggregation performance task
SERVER-23819 buildlogger client requests should use basic auth instead of digest auth
SERVER-24719 Run the Validate hook on the 3.2 branch
SERVER-25324 Expose a function in the shell to compare BSON at a byte level
SERVER-25348 Parameterize branch in etc/system-perf.yml
SERVER-25358 resmoke does not terminate mongod cleanly on Windows
SERVER-25391 Update v3.2 and master builders to use the vendored SCons 2.5.0
SERVER-25416 killop_own_ops.js should use failpoints instead of long running $where
SERVER-25465 Mongos crashing due to segmentation error.
SERVER-25578 Update parameter name of reports directory passed in to post run analysis scripts (sys-perf & perf projects)
SERVER-25580 New baseline for mongo-perf Q3 2016
SERVER-25587 blacklist findAndModify_update_and_grow
SERVER-25627 Remove the concurrency_simultaneous suite from v3.2
SERVER-25672 Update compile task distro for mongo-perf-3.2, sys-perf-3.2, and mongo-perf-3.0
SERVER-25711 Replace occurance of ‘sslspecial’ with ‘sslSpecial’ in v3.2 evergreen.yml
SERVER-25784 sys-perf-3.2 project should include “platform” expansion
SERVER-25947 jsCore_v33_validate should set multiversion_platform_arch
SERVER-26041 Use bsonBinaryEqual in checkDBHashesForReplSet
TOOLS-1371 mongorestore assumes admin.system.version only contains authSchema document

New in MongoDB 3.2.9 (Aug 17, 2016)

New in MongoDB 3.2.8 (Jul 13, 2016)

New in MongoDB 3.2.7 (Jun 27, 2016)

New in MongoDB 3.2.3 (Feb 18, 2016)

New in MongoDB 3.2.1 (Jan 21, 2016)

Highlights:
Fixed error where during a regular shutdown of a replica set, secondaries may mark certain replicated but yet to be applied operations as successfully applied: SERVER-21868.
Improve insert workload performance with WiredTiger on Windows: SERVER-20262.
Fixed long-running transactions during chunk moves: SERVER-21366
Fixed issues:
Task TOOLS-1025: Update tests to conform to ReplSetTest changes
Task TOOLS-1021: Change mongo-tools evergreen config to use MongoDB 3.2 for master branch tests
Bug TOOLS-1013: stat_discover.js test is flaky (again)
Bug TOOLS-1002: oplog_rollover test is flaky
Bug TOOLS-982: Missing "from" text in mongorestore status message
Improvement TOOLS-954: Add bypassDocumentValidation option to mongorestore and mongoimport
Bug TOOLS-944: write concern mongos tests are flaky
Task SERVER-22009: Turn on regression tracking for DSI tests on 3.2
Task SERVER-22008: Turn on regression tracking for performance projects on 3.2
Bug SERVER-21999: sys-perf: fix issue with EVG log file name
Bug SERVER-21996: Increase stability of autodiscover_config_rs_from_secondary.js test
Bug SERVER-21971: Not possible to elect a primary if non-voting member is ahead (PV0)
Bug SERVER-21961: Get rid of the annoying error message in post-step for perf.yml & system_perf.yml
Bug SERVER-21955: CleanEveryN hook isn't compatible with MasterSlaveFixture
Improvement SERVER-21950: Run concurrency suite on compile variants for DEBUG builds
Bug SERVER-21930: Restart oplog query if oplog entries are not monotonically increasing
Bug SERVER-21923: ReplSetTest.awaitSecondaryNodes does not propagate supplied timeout
Bug SERVER-21920: Use enhanced WiredTiger next_random cursors for oplog stones
Bug SERVER-21901: CheckReplDBHash checks the wrong node when dumping docs from missing collections
Task SERVER-21893: JS tests that use dbHash incorrectly check number of collections
Bug SERVER-21891: perf.yml dependency check misconfigured for misc-wt-mmap-repl-comp
New Feature SERVER-21890: Create a flag to allow server realm to be specified explicitly on Windows
Bug SERVER-21885: capped_truncate.js cannot be run with --repeat
Improvement SERVER-21872: WiredTiger changes for 3.2.1
Bug SERVER-21871: Do not run min_optime_recovery.js on ephemeralForTest storageEngine
Bug SERVER-21870: Missing space in error message
Bug SERVER-21868: Shutdown may not be handled correctly on secondary nodes
Bug SERVER-21867: WiredTiger oplog cursor can return repeated segments
Bug SERVER-21864: streamline artifact signing procedure to support coherent release process
Bug SERVER-21852: kill_cursors.js fails in small_oplog* configurations
Bug SERVER-21849: Fix timestamp compare in min_optime_recovery.js
Bug SERVER-21848: bulk write operations on config/admin triggers invariant failure
Improvement SERVER-21847: log range of operations read from sync source during replication
Bug SERVER-21835: Prevent CappedPositionLost workload failures with indexed_insert_base_capped.js
Task SERVER-21824: Disable kmip.js test in ESE suite; re-enable once fixed
Bug SERVER-21796: fix startup_log.js test to handle git describe versioning
Bug SERVER-21795: Do not reschedule more than one liveness timeout callback at a time
New Feature SERVER-21793: create v3.2 branch and update evergreen configuration
Bug SERVER-21792: Performance regression with directio enabled on Windows with WiredTiger
Task SERVER-21786: Fix code coverage gaps in s/query directory exposed by code coverage tool
Bug SERVER-21781: Nightly packages are in the wrong repo directories
Bug SERVER-21772: findAndModify not captured by Profiler
Task SERVER-21768: Remove the 'numCollections' field from dbHash's response
Task SERVER-21763: Track "compare" task for performance results as regular regression tasks.
Bug SERVER-21752: slow2_wt fails by exhausting host machine's memory
Bug SERVER-21750: getMore command does not set "nreturned" operation counter
Task SERVER-21737: remove deprecated release process configuration from master branch evergreen configuration
Task SERVER-21725: Enable the analysis script move
Bug SERVER-21724: Backup role can't read system.profile
Improvement SERVER-21719: Add initiateTimeout rsOption for ShardingTest
Improvement SERVER-21714: Increase replSetTest.initiate() timeout for FSM tests
Bug SERVER-21706: Certain parameters to mapReduce trigger segmentation fault in a sharded cluster
Bug SERVER-21704: JS Test single_node_config_server_smoke has race condition
Bug SERVER-21667: do not set lastop on clients used by replication on secondaries
Task SERVER-21665: Suppress tar output in jstestfuzz tasks
Task SERVER-21638: Audit and improve logging in new find/getMore commands code
Task SERVER-21637: Add mixed version tests for find/getMore commands
Task SERVER-21602: Reduce execution time of cursor_timeout.js
Task SERVER-21600: Increase test coverage for killCursors command and OP_KILLCURSORS
Task SERVER-21586: Investigate v3.0 mongos and v3.2 cluster compatibility issues in jstests/sharding
Bug SERVER-21545: collMod and invalid parameter triggers fassert on dropCollection on mmapv1
Bug SERVER-21536: Invariant failure in executor/connection_pool.cpp
Task SERVER-21516: Remove dbStats command from readConcern testing override
Task SERVER-21500: Include the name of the FSM workload in the WorkloadFailure description
Improvement SERVER-21450: Modify MongoRunner to add enableMajorityReadConcern flag based on jsTestOptions
Improvement SERVER-21426: Add writeConcern support to benchRun
Improvement SERVER-21384: Expand testing for in memory storage engines
Improvement SERVER-21248: jstests for fast-failover correctness
Task SERVER-21214: Dump config server data when the sharded concurrency suites fail
Task SERVER-21164: Change assert to throw in rslib.js's wait loop
Task SERVER-21139: Add more basic tests for drop collection
Task SERVER-21138: Add more basic tests for dropDatabase
Task SERVER-21137: Add more basic tests for movePrimary
Task SERVER-21136: Add more basic tests for enableSharding
Task SERVER-21135: Add more basic tests for sharded implicit database creation
Task SERVER-21134: Add more basic tests for shardCollection
Task SERVER-21133: Add more basic test for mergeChunk
Task SERVER-21132: Add more basic tests for moveChunk
Task SERVER-21076: Write tests to ensure that operations using DBDirectClient handle shard versioning properly
Task SERVER-20824: Test for sharding state recovery
Task SERVER-13370: Generate Enterprise RPM's for Amazon Linux

New in MongoDB 3.2.0 (Jan 4, 2016)

New in MongoDB 3.2.1 RC 2 (Jan 4, 2016)

Security:
SERVER-21724 Backup role can’t read system.profile
SERVER-21824 Disable kmip.js test in ESE suite; re-enable once fixed
SERVER-21890 Create a flag to allow server realm to be specified explicitly on Windows
Sharding:
SERVER-20824 Test for sharding state recovery
SERVER-21076 Write tests to ensure that operations using DBDirectClient handle shard versioning properly
SERVER-21132 Add more basic tests for moveChunk
SERVER-21133 Add more basic test for mergeChunk
SERVER-21134 Add more basic tests for shardCollection
SERVER-21135 Add more basic tests for sharded implicit database creation
SERVER-21136 Add more basic tests for enableSharding
SERVER-21137 Add more basic tests for movePrimary
SERVER-21138 Add more basic tests for dropDatabase
SERVER-21139 Add more basic tests for drop collection
SERVER-21366 Long-running transactions in MigrateStatus::apply
SERVER-21586 Investigate v3.0 mongos and v3.2 cluster compatibility issues in jstests/sharding
SERVER-21704 JS Test single_node_config_server_smoke has race condition
SERVER-21706 Certain parameters to mapReduce trigger segmentation fault in a sharded cluster
SERVER-21786 Fix code coverage gaps in s/query directory exposed by code coverage tool
SERVER-21848 bulk write operations on config/admin triggers invariant failure
Replication:
SERVER-21248 jstests for fast-failover correctness
SERVER-21667 do not set lastop on clients used by replication on secondaries
SERVER-21795 Do not reschedule more than one liveness timeout callback at a time
SERVER-21847 log range of operations read from sync source during replication
SERVER-21868 Shutdown may not be handled correctly on secondary nodes
SERVER-21930 Restart oplog query if oplog entries are not monotonically increasing
Query:
SERVER-21600 Increase test coverage for killCursors command and OP_KILLCURSORS
SERVER-21602 Reduce execution time of cursor_timeout.js
SERVER-21637 Add mixed version tests for find/getMore commands
SERVER-21638 Audit and improve logging in new find/getMore commands code
SERVER-21750 getMore command does not set “nreturned” operation counter
Storage:
SERVER-21384 Expand testing for in memory storage engines
SERVER-21545 collMod and invalid parameter triggers fassert on dropCollection on mmapv1
SERVER-21885 capped_truncate.js cannot be run with –repeat
SERVER-21920 Use enhanced WiredTiger next_random cursors for oplog stones
WiredTiger:
SERVER-21792 75% performance regression in insert workload under Windows between 3.0.7 and 3.2 with WiredTiger
SERVER-21872 WiredTiger changes for 3.2.1
Operations:
SERVER-21870 Missing space in error message
Build and Packaging:
SERVER-13370 Generate Enterprise RPM’s for Amazon Linux
SERVER-21781 Nightly packages are in the wrong repo directories
SERVER-21796 fix startup_log.js test to handle git describe versioning
SERVER-21864 streamline artifact signing procedure to support coherent release process
Tools:
TOOLS-954 Add bypassDocumentValidation option to mongorestore and mongoimport
TOOLS-982 Missing “from” text in mongorestore status message
Internals:
SERVER-21164 Change assert to throw in rslib.js’s wait loop
SERVER-21214 Dump config server data when the sharded concurrency suites fail
SERVER-21426 Add writeConcern support to benchRun
SERVER-21450 Modify MongoRunner to add enableMajorityReadConcern flag based on jsTestOptions
SERVER-21500 Include the name of the FSM workload in the WorkloadFailure description
SERVER-21516 Remove dbStats command from readConcern testing override
SERVER-21665 Suppress tar output in jstestfuzz tasks
SERVER-21714 Increase replSetTest.initiate() timeout for FSM tests
SERVER-21719 Add initiateTimeout rsOption for ShardingTest
SERVER-21725 Enable the analysis script move
SERVER-21737 remove deprecated release process configuration from master branch evergreen configuration
SERVER-21752 slow2_wt fails by exhausting host machine’s memory
SERVER-21768 Remove the ‘numCollections’ field from dbHash’s response
SERVER-21772 findAndModify not captured by Profiler
SERVER-21793 create v3.2 branch and update evergreen configuration
SERVER-21849 Fix timestamp compare in min_optime_recovery.js
SERVER-21852 kill_cursors.js fails in small_oplog* configurations
SERVER-21871 Do not run min_optime_recovery.js on ephemeralForTest storageEngine
SERVER-21901 CheckReplDBHash checks the wrong node when dumping docs from missing collections
SERVER-21923 ReplSetTest.awaitSecondaryNodes does not propagate supplied timeout
TOOLS-944 write concern mongos tests are flaky
TOOLS-1002 oplog_rollover test is flaky

New in MongoDB 3.1.8 Dev (Oct 6, 2015)

New in MongoDB 3.0.6 (Aug 28, 2015)

New in MongoDB 3.1.7 Dev (Aug 22, 2015)

Bug SERVER-19513: Truncating a capped collection may not unindex deleted documents in WiredTiger
Bug SERVER-19573: MongoDb crash due to segfault
Bug SERVER-19824: Mongo shell should report that subprograms exited with non-zero exit code if they die …
Bug SERVER-19644: Seg Fault on cloneCollection (specifically gridfs)
Bug SERVER-19805: MMap memory mapped file address allocation code cannot handle addresses non-aligned to memory mapped granularity size
Task SERVER-19819: Update perf.yml to use new mongo-perf release
Bug SERVER-19673: Excessive memory allocated by WiredTiger journal
Bug SERVER-19131: clusterManager role does not have permission for adding tag ranges
Bug SERVER-19674: Fatal error calling createIndex with 2dsphere
Bug SERVER-19464: $sort stage in aggregation doesn't call scoped connections done ()
Bug SERVER-19348: $mod results are inconsistent with indexing enabled on Infinity, -Infinity, NaN
Task SERVER-19502: Generate ARM64 configurations for SpiderMonkey
Bug SERVER-13966: LIBDEPS_DEPENDENTS does not resolve library names the same as LIBDEPS
Bug SERVER-19349: $type results are inconsistent with indexing enable on Infinity, -Infinity, NaN
Bug SERVER-19641: quit() in the shell quickExits from deep in the javascript stack
Bug SERVER-19560: Scope::createFunction does not remove invalid functions from cache, leading to segfault
New Feature SERVER-19458: Create a utility function to zero memory regions
Bug SERVER-19531: Generate SpiderMonkey config for FreeBSD 10.1
Task SERVER-19336: Add ESE Tasks to Evergreen
Bug SERVER-17980: CatalogManagerLegacy should not allow replica sets as config servers
Bug SERVER-19442: ESE- Access violation as result of invalid pointer under low resources simulation
Bug SERVER-19374: TTL Monitor does not yield while deleting expired documents
Improvement SERVER-19235: CanonicalQuery::canonicalize to use a NamespaceString rather than a std::string
Bug SERVER-19403: Provide feedback to RemoteCommandTargeter on NotMaster errors
Bug SERVER-19404: Ensure that all places using RemoteCommandTargeter to run PrimaryOnly commands have NotMaster retry logic
Improvement SERVER-18997: Server does not validate boolean values in BSON
Task SERVER-19371: FSM - Blacklist failing workloads in Replication & Sharded suites
Bug SERVER-8843: serverStatus.extra_info.page_faults overflows and goes negative
Bug SERVER-19431: The mongo::hasher algorithm is not endian clean
Task SERVER-19376: Make SpiderMonkey the default JS Engine
Task SERVER-19493: Javascript "Error" objects thrown in the shell should include a "code" field where possible for easier programmatic inspection
Task SERVER-19512: Remove jstests/multiVersion/config_version_excludes.js as it tests a deprecated feature
Bug SERVER-19508: SpiderMonkey stacktraces lack file names
Bug SERVER-19516: MozJS isn't aggresive enough in Garbage Collection
Task SERVER-19492: Replace ReplicationExecutor with ThreadPoolTaskExecutor in sharding code
Task SERVER-19494: Don't shutdown mongobridge on empty response object
Bug SERVER-18951: dassert in waitForWriteConcern fails when w:majority adds j:true with journaling off
Improvement SERVER-19504: Remove indexStats command artifacts
Task SERVER-19414: Switch to using CatalogManagerReplicaSet if configdb connection string is for a replset
Bug SERVER-19526: isCollectionLockedForMode is expensive because it mallocs a lot.
Bug SERVER-18913: Coverity analysis defect 72775: Redundant test
Improvement SERVER-19391: BSONObjBuilder::appendAsNumber is unused.
Bug SERVER-19558: ScopeCache doesn't see cleanup in shutdownServer
Task SERVER-19456: Use final designators where appropriate in PlanStages
Task SERVER-19289: In jstests, when using CSRS always use storageEngine=wiredTiger
Task SERVER-19520: Reduce 32-bit test coverage
Improvement SERVER-19529: FSM tests - add cleanupOptions for runWorkloads
Bug SERVER-19395: mongos may send write commands over non-sharding aware connections
Bug SERVER-19602: Clean up how ShardingTest restarts mongos and mongod processes
Task SERVER-19563: Remove DBClientInterface::sayPiggyBack() and related code
Task SERVER-19514: Run sharding tests using 2 node CSRS
Improvement SERVER-19625: Update evergreen.yml to make jstestfuzz task to run on all linux variants
New Feature SERVER-19659: Allow secondaries to work with ReplicationCoordinatorImpl::awaitReplication
Bug SERVER-19615: FSM ThreadManager.checkFailed doesn't join threads if failure threshold is exceeded
Bug SERVER-19653: Reduce disk writes in rename_collection_dbname_chain.js FSM workload
Task SERVER-19587: remove bootstrap codepath from NetworkInterfaceASIO
Task SERVER-19067: Warn at creation that autoIndexId:false is deprecated
Bug SERVER-19690: ImplScope::exec doesn't respect printResult
Bug SERVER-19691: Allow ShardRegistry to be destroyed if 'startup' was never called
Bug SERVER-19698: Typo in error message
Bug SERVER-19693: Deadlock in map reduce when bailFromJS called
Task SERVER-18191: improve heartbeat protocol for the new election protocol
Bug SERVER-19455: Move DBClient auth methods to a separate library
Improvement SERVER-19307: Use find/getmore commands in bgsync thread
Task SERVER-19609: Put shard version on OperationContext
Task SERVER-19743: Add Evergreen's execution count to jstestfuzz artifacts
Improvement SERVER-15344: Make replWriter thread pool size tunable
Improvement SERVER-19433: ESE usability improvements - configuration options
Improvement SERVER-19501: Backup/restore tests
Improvement SERVER-18522: Majority (WC) writes, even no-ops, must enforce replication WC
Bug SERVER-19725: NULL pointer crash in QueryPlanner::plan with $near operator
Bug SERVER-19727: BulkWriteError and WriteCommandError capture less info in MozJS than v8
Bug SERVER-19597: Overwriting ObjectId leads to null pointer crash
Task SERVER-19364: PlanStages shouldn't have to track OperationContext pointers
Bug SERVER-19675: committed snapshot not set on secondaries
Bug SERVER-18056: 2d nearSphere performance regression
Improvement SERVER-19490: Add distributed system performance test into Evergreen loop
Improvement SERVER-18925: Merging part of aggregation pipeline should be performed on a random shard to distribute the load
Task SERVER-19343: Inject SocketFactory in to NetworkInterfaceASIO
Improvement SERVER-19567: Compatibility layer for display of find/getMore commands in currentOp
New Feature SERVER-18879: Add "indexOptionDefaults" to createCollection()
Improvement SERVER-19183: Allow storage engines to provide optimized random cursors for use by $sample
New Feature SERVER-19524: Support for configServer labeling of replica set configurations
Task SERVER-19732: Standardize on "configsvr" as the way to mark CSRS replica sets
Improvement SERVER-19545: Prohibit config server replica sets from being added as shards
Task SERVER-17286: Update mongo shell for find and getMore commands
Task SERVER-19606: Upgrade / downgrade of election protocol version
Bug SERVER-19711: verify() failure when passing empty 'query' value to runCommand
Bug SERVER-19776: wrap rawMongoProgramOutput in assert.soon
Improvement SERVER-17895: Server should not clear collection plan cache periodically when write operations are issued
Task SERVER-19780: Copy binaries before generating jstestfuzz tests
Bug SERVER-19785: stepdown_while_draining.js fails due to inserting on transition to primary
Task SERVER-19539: Provide data in the ismaster handshake to identify the config server protocol
Bug SERVER-19782: Shutting down during transition to primary can deadlock
Improvement SERVER-13535: Full text search tokens needs to strip diacritic marks
Bug SERVER-19751: WiredTiger panic halt in eviction-server
Bug SERVER-19340: Vendored wiredtiger rand.c fails to compile without -fno-strict-aliasing
Bug SERVER-19557: Create Text Index v3
Improvement SERVER-18584: A primary should write 'n' op when elected
Task SERVER-19880: Upgrade/Dowgrade test - update for Text index V3
Bug SERVER-19852: validateWriteConcern should allow w > 1 integer write concerns on collections stored in config server replica sets
Task SERVER-19390: Wire Read After Optime support into Replica Set Catalog Manager
Task SERVER-19624: Add experimental Decimal128 data type support to mongo/bson layer
Task SERVER-19623: Add C++ wrapper around Intel RDFP math library for experimental Decimal128 data type
Task SERVER-19626: Add experimental Decimal128 data type support to core expression leaf
Task SERVER-19797: Hook up find command in mongos to the ClusterCursorManager
Bug SERVER-19835: SubplanStage should not cache plan for an individual $or branch if plans tie or there are no query results
Bug SERVER-19731: Make sharding_passthrough suite set up multi-node CSRS with wiredTiger as the storage engine
Task SERVER-19448: Implement resmoke.py support for CPP Integration Tests
Task SERVER-19447: Implement SCons support for CPP Integration Tests
Task SERVER-19449: Implement C++ scaffolding for CPP Integration Tests
New Feature SERVER-18872: ESE Key Manager (Multiple Keys)
Bug SERVER-19865: race condition in network_interface_asio_test
Improvement SERVER-19347: Generic upgrade/downgrade jstest framework
New Feature SERVER-18427: Request for log and exponential arithmetic operators in aggregation pipeline
New Feature SERVER-19548: Add aggregation expressions for $floor, $ceil, and $trunc
Improvement SERVER-13099: Expand set of delimiters recognized by text search tokenizer
Improvement SERVER-8423: Text search case folding needs utf-8 support
Bug SERVER-19873: Let saslClientAuthenticate handle unrecognized auth mechanisms
Improvement SERVER-19570: Shell should issue kill against find command cursors when the cursor object is destroyed
Task SERVER-19764: Store the last vote when voting for myself
Bug SERVER-19862: authentication code should not depend on DBClient
Sub-task SERVER-19213: SERVER-18022 Set enableReplSnapshotThread server param to default true
Sub-task SERVER-19212: SERVER-18022 New indexes shouldn't be usable until they are in the committed view
Improvement SERVER-14036: Ubuntu Key File belongs to Richard Kreuter
Task SERVER-18767: Make find command shard version aware
Task SERVER-19665: Find and getMore commands should use a default timeout of 1 second for tailable, awaitData cursors
Improvement SERVER-15204: Skip validation for stored geometry if a 2dsphere index exists
Bug SERVER-19800: DataSizeChange forces an int into a bool
Improvement SERVER-19593: Allow collscans on $snapshot queries when not using MMAP1
Improvement SERVER-19463: Add longevity test into Evergreen loop
Bug SERVER-19738: Restore current term at startup
Task SERVER-19786: Cache term in replication coordinator
Bug SERVER-19804: join thread first before attaching repl response metadata
Task SERVER-18766: Implement manager for ClusterClientCursor
Bug SERVER-19713: verify() failure when specifying $minDistance or $maxDistance without geoNear operator
Task SERVER-18771: Implement getMore command on mongos
Improvement SERVER-19775: Do not apply the first oplog entry during initial sync
Bug SERVER-19728: Invariant failure newCommittedSnapshot > *_currentCommittedSnapshot
Task SERVER-19446: adding a special server parameter for majority read concern without replica sets for testing
Task SERVER-19222: Add a NetworkInterfaceASIO builder to evergreen
Task SERVER-19811: Disable FSM workloads that drop and reuse sharded namespaces
Task SERVER-19622: Vendorize Intel DFP math library for 128-bit binary integer decimal support
Bug SERVER-19511: Distinct command with no predicate can miss results when distinct field is first key pattern element of partial index
Improvement SERVER-19429: ESE usability - improve data file and storageEngine sanity checks
Bug SERVER-19694: Distributed lock should retry on duplicate key error creating the lock entry
Improvement SERVER-18363: Voters must only sync from other voters
New Feature SERVER-19537: Allow replSetInitiate on nodes not started with --replSet
Bug SERVER-19848: Don't define 'trunc' in MozJS on windows
Task SERVER-19808: Improve stack-trace reports from concurrency suite
Bug SERVER-19747: MinKey/MaxKey not printing as JSON in MozJS
Bug SERVER-19705: SpiderMonkey error codes overlap with Mongo error codes in thrown user assertions
Bug SERVER-19822: Zip file has wrong directory name
New Feature SERVER-17953: Implement Driver CRUD API Spec in shell
Bug SERVER-19853: Can't use constexpr numeric_limits on msvc in MozJS
Bug SERVER-19814: Shell performs getMore with wrong cursor id when "commands" read mode is enabled, for large cursor id values
Bug SERVER-19561: Expand pkill targets in evergreen.yml to clean up old lldb and unit test binaries
Task SERVER-19834: Use generic pkill target in evergreen.yml to kill all unit test processes
Bug SERVER-19682: Prevent JSThread exceptions in concurrency suite when global db is undefined
Improvement SERVER-18022: Support "read committed" isolation level where "committed" means confirmed by the voting majority of a replica set
Task SERVER-19637: Add election timeout to replica set config
Bug SERVER-19810: mongos requires queries on $cmd.sys.inprog to use "admin" database
Task SERVER-19155: async auth support in NetworkInterfaceASIO
Task SERVER-19627: Add experimental Decimal128 data type support to the MongoDB shell as NumberDecimal
Task SERVER-19628: Add experimental Decimal128 data type to update and delete code paths
Task SERVER-19629: Add round trip & CRUD JavaScript tests for shell-supported NumberDecimal data type
Bug SERVER-19367: Segfault establishing shard connection in Chunk::splitMulti
Task SERVER-19889: add ability to set request metadata and read response metadata in the shell
Bug SERVER-19466: logOp fassert when primary steps down during a TTL delete
Improvement SERVER-8770: Sign RPM packages available via the 10gen yum repository
Task SERVER-19820: Update perf.yml to use mongo-perf check script
Improvement SERVER-18474: provide core dump on fassert and invariant failures
Bug SERVER-18351: 'Invalid epoch' fatal assertion when concurrently dropping and sharding collection
Task SERVER-18606: Use find command instead of query for repl syncing
Improvement SERVER-19571: Allow configuration of shell read mode with resmoke.py, add "commands" read mode coverage to CI loop
Bug SERVER-19664: Reduce disk writes in drop_database.js FSM workload
New Feature SERVER-19650: update YML files to tag system/test command types
Bug SERVER-19553: Mongod shouldn't use sayPiggyBack to send KillCursor messages
Bug SERVER-19612: JSThread exception messages are not printed when using SpiderMonkey
Bug SERVER-16021: WT failed to start with "lsm-worker: Error in LSM worker thread 2: No such file or directory"
Task SERVER-19439: Implement connect hook interface in NetworkInterfaceImpl and NetworkInterfaceMock
Task SERVER-19646: pass ASIO setParameter through to ReplSetTests and ShardingTests via TestData
Bug SERVER-19319: CatalogManagerReplicaSet needs to send setShardVersion to primary shard after sharding a collection
Bug SERVER-19398: command_user_defined_roles.js incorrectly modifies db and collection names of privileges
Bug SERVER-16322: Make sure that RecoveryUnit::commit() can safely throw WriteConflictException
Task SERVER-19613: Add build flag to switch on/off experimental Decimal128 data type support
Bug SERVER-19856: Register for PRESHUTDOWN notifications on Windows Vista+
Bug SERVER-19320: NetworkInterfaceASIO will never send empty Messages
Bug SERVER-19951: PlanExecutor::ExecState state in find_cmd.cpp accessed without being initialized
Task SERVER-19359: Implement timed task execution with NetworkInterfaceASIO
Improvement SERVER-9625: Support many accumulators in aggregation framework as expressions
Bug SERVER-19284: Should not be able to create role with same name as builtin role
Bug SERVER-19909: Consider election race in restore_term.js
Task SERVER-19697: AsyncCommand objects should hold their start time
Task SERVER-19899: Mongo-perf analysis script -- Check for per thread level regressions
Improvement SERVER-19983: Performance Regression in Mongo-perf Commands.DistinctWithIndexAndQuery
Task SERVER-18772: Use ClusterClientCursor framework for OP_QUERY style find on mongos
Bug SERVER-19952: System Performance task failed as a system failure
Improvement SERVER-19532: WiredTiger changes for MongoDB 3.1.7
Improvement SERVER-19554: Return last visible optime in repldata metadata for all commands
Bug SERVER-18581: The Ubuntu package should start the mongod with group=mongodb
Bug SERVER-20013: Don't blacklist the upstream if its config version is greater
Bug SERVER-20001: Coverity analysis defect 73592: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Task SERVER-19992: Move ConfigServerMode enum out of server_options.h
Improvement SERVER-16398: Remove support for "cursorInfo" command
Improvement SERVER-19509: The nproc ulimits are different across packages
Bug SERVER-20021: Deadlock between SyncSourceFeedback and ReplicationCoordinator mutexes
Improvement SERVER-19877: Change format of accumulator unit tests
Improvement SERVER-19308: Basic test coverage for listCommands command
New Feature SERVER-19809: Lower frequency of execution for some buildvariants to once per day
Improvement SERVER-10160: gen_error_codes.py should generate a js module with symbolic constants for the error codes in the shell.
New Feature SERVER-18743: Create a "flaky test finder" buildvariant
Bug SERVER-20031: Avoid unexpected primary in protocol_version_upgrade_downgrade.js
Task SERVER-19420: Implement Connection Hooking in NetworkInterfaceASIO
Bug SERVER-19869: Prevent active CatalogManager from changing while holding a distributed lock
Improvement SERVER-15893: root role should be able to run validate on system collections
Improvement SERVER-19963: More detailed log information when querying shard info fails
Improvement SERVER-19480: Meaningful geoNear specific statistics after eliminating duplicated index scans
Task SERVER-19720: add a std::error_category for MongoDB error codes
New Feature SERVER-15020: Implement explain for the distinct command
Sub-task SERVER-19987: SERVER-19966 Limit the size of the per-session cursor cache
Improvement SERVER-19833: Error out when attempting to do committed reads on non-supported storage engines
Improvement SERVER-19369: Add String.includes() polyfill
Bug SERVER-9686: HexData, UUID, and MD5 in v8 crash process when called with invalid hex string
Bug SERVER-16703: Javascript function may incorrectly return undefined when function definition contains "return" keyword
Improvement SERVER-19370: String.endsWith() shouldn't use regexp (even escaped)
Bug SERVER-19933: check validity of "configsvr:true" at config validation time
Improvement SERVER-19890: Fix jstests/replsets/read_committed_no_snapshots.js to correctly get the real last OpTime
Bug SERVER-19947: Deadlock between aggregations with sorts on sharded collections and operations requiring MODE_X database locks
Improvement SERVER-19421: Refactor FTS to use abstract interfaces for phrase matching
Improvement SERVER-19639: Add a Unicode tokenizer and Unicode phrase matcher implementation.
Bug SERVER-19944: Apply basic perf optimizations to text index v3
Task SERVER-19914: Store config server connection string in ShardRegistry instead of CatalogManager
Improvement SERVER-19299: add the ability to pass --setParameter arguments on the command line to resmoke.py
Bug SERVER-19380: asio::ip::tcp::resolver::iterator instances should be passed by value
New Feature SERVER-19465: Add Unicode data classes to support FTS Unicode Improvements
Task SERVER-19221: Conduct async SSL handshake in NetworkInterfaceASIO
Task SERVER-19886: Make tests run config servers with 3 member replica sets
New Feature SERVER-5811: Make a killCursors command
Task SERVER-19736: Add opTime invariant checks when updating cached config server data
Bug SERVER-19969: Update config server connection string stored in shard registry on config server replset reconfig
Bug SERVER-19522: Capped collection insert rate declines over time under WiredTiger
Improvement SERVER-19876: Include host seed list information in ismaster response of removed replica set nodes
Bug SERVER-19640: dataSize command parses namespace incorrectly when sharded
Bug SERVER-19965: Increase timeout in stepdown_catch_up_opt.js for windows
Bug SERVER-20028: replsets/sync_passive2.js on Linux64
Bug SERVER-20003: Coverity analysis defect 73585: Dereference after null check
Task SERVER-19984: Block read committed reads after metadata changes, rather than returning an error
Bug SERVER-20058: mongos deadlock while replacing catalog manager
New Feature SERVER-19543: Dynamically change config protocol in mongos and shard servers
Improvement SERVER-19893: Generate packages on their own platforms
Task SERVER-19830: Liveness detection for downstream members via updatePosition
Bug SERVER-19925: move protocolVersion field to top level
Bug SERVER-19474: Calling createIndex() can cause the shell to stall
Task SERVER-19499: Print out FSM workload schedules in the concurrency suite
Improvement SERVER-19450: Change BSONElement::getGtLtOp() to use StringMap rather than a large if-else
Improvement SERVER-19478: Save files generated by jstestfuzz in Evergreen
Task SERVER-19647: Generate SpiderMonkey config for OpenBSD
Bug SERVER-19672: Array functions in shell can cause stall
Task SERVER-19749: add char array overload for mongo::optionenvironment::Value constructor
Task SERVER-19826: Upgrade node.js version used by jstestfuzz
Task SERVER-19861: convert uses of std::chrono::duration::count() to mongo::durationCount()
Improvement SERVER-19596: Implicit Circular Dependency with S2 Keys
Improvement SERVER-19528: Change validationState to validationAction
Bug SERVER-18516: ubuntu/debian packaging : Release files report wrong Codename
Improvement SERVER-19838: Remove superfluous member DeleteStageParams::shouldCallLogOp
Improvement SERVER-12856: Add createIndexes shell helper
Bug SERVER-10152: Second argument of BinData and HexData not checked for type
Bug SERVER-8744: NumberInt overflow handling is different in V8 and Spidermonkey
Bug SERVER-9973: NumberLong(NumberLong(1)) throws error: Could not convert "NumberLong(1)" to NumberLong
Bug SERVER-19631: Reduce the logging level of the mock thread pool executor
Bug SERVER-19160: hostInfo for Mac OS has extra characters
Task SERVER-19812: Clean up comments in concurrency suite blacklists
Bug SERVER-19479: Enterprise Repo build.py AttributeError
Improvement SERVER-19807: Remove dead method LiteParsedQuery::isRecordIdMeta()
Bug SERVER-18952: Improve formatting of "starting new replica set monitor..." message

New in MongoDB 3.1.5 Dev (Jul 10, 2015)

Bug SERVER-17254: WT: drop collection while concurrent oplog tailing may greatly reduce throughput
Bug SERVER-18902: Retrieval of large documents slower on WiredTiger than MMAPv1
Bug SERVER-19143: race in setting OpDebug ns can cause invalid BSON to be returned from currentOp command
Bug SERVER-18858: MatchExpression use-after-free after dropping partial index
Bug SERVER-18266: Standardize token-length limits between RLP and Snowball
Bug SERVER-18807: rollback should drop dblock when fetching docs over the network
Task SERVER-18435: Integrate RS monitor with RemoteCommandTargeterRS
Task SERVER-18438: Add a RemoteCommandTargeter to Shard
Task SERVER-18576: Enhance upload.py
Bug SERVER-19025: add fassertStatusOK to errorcodes.py
Improvement SERVER-17308: Replace boost::scoped_ptr with std::unique_ptr
Bug SERVER-19055: Cleanup memory in scoped_db_conn_test
Bug SERVER-18062: Creating an index on a collection in a non-existent database when connected to mongos throws error
Improvement SERVER-18839: Define suites for subsets of unittests from each major area of the codebase
Improvement SERVER-18810: FSM - sharding tests using 2 mongos
Improvement SERVER-17307: Replace uses of boost::shared_ptr with std::shared_ptr
Bug SERVER-18524: Different parsing for RLP index keys and queries leads to missing results
Task SERVER-18623: Create basic Executor interface and change ReplicationExecutor to implement it
Bug SERVER-18876: Coverity analysis defect 49646: Unchecked return value
Bug SERVER-18891: Coverity analysis defect 72756: Unchecked return value
Bug SERVER-18863: Coverity analysis defect 72746: PW.PARAMETER_HIDDEN
Bug SERVER-18778: Coverity analysis defect 72724: PW.PARAMETER_HIDDEN
Task SERVER-18791: Pull count command parsing into a separate library
Sub-task SERVER-18800: SERVER-17858 Expand support for $in queries to be answered by partial index
Bug SERVER-18552: Delimiters are indexed in text indexes
Improvement SERVER-17810: "matchTested" exec stage statistic is misleading
Improvement SERVER-17309: Replace std::auto_ptr with std::unique_ptr
Task SERVER-19041: Simplify mutex usage
Bug SERVER-18978: Fix comment word wrapping indentation
Task SERVER-18575: Add clang_format.py
Bug SERVER-18679: Wrong key count for reverse indexes in WT
Task SERVER-18579: Enforce clang-format in MCI
Improvement SERVER-18834: Expose way for how to run jstests specified on resmoke.py command line
Improvement SERVER-18756: resmoke.py should write combined report of repeated executions
Improvement SERVER-18572: resmoke.py should prefix test log output with a timestamp
Task SERVER-19069: Implement getTagsForCollection in the replica set catalog manager
Improvement SERVER-18953: Generate debug symbols on OS X
Improvement SERVER-9567: Add support for seperate debug info files on ELF
Task SERVER-19078: CatalogManager::getChunks should accept sort and limit
Bug SERVER-18459: Include third party notices file in enterprise zips
Improvement SERVER-18883: Separate user role resolution into own function
Improvement SERVER-17854: Allow $or predicates to be indexed by partial indexes
Improvement SERVER-18180: Clean up partial_index tests for style and clarity
Improvement SERVER-18878: FSM workloads with replication should be completed on secondary before next workload runs
Bug SERVER-17199: Fix building on platforms without execinfo.h
Task SERVER-18935: dbtests require journaling to be on
Bug SERVER-18954: Race in replset_distlock_manager_test can cause it to grab out of scope test mutex
Task SERVER-18950: Make LiteParsedQuery return StatusWith
Bug SERVER-18903: Unreachable code in DataReplicator::_onOplogFetchFinish
Improvement SERVER-18866: make global replication coordinator a decoration on service context
Task SERVER-18901: Move QueryFetcher out of data_replicator.cpp and into its own library
Task SERVER-17990: KMIP - refactor SSL interface to allow multiple outgoing certificates
Task SERVER-19020: Implement getChunks in the replica set catalog manager
Task SERVER-18723: Replace boost:: with stdx:: for concurrency types
Bug SERVER-15217: v2.6 query plan ranking test "NonCoveredIxisectFetchesLess" relies on order of deleted record list
Improvement SERVER-19029: Configure boost thread to more closely model the standard
Task SERVER-18167: handle BSON validation in OP_COMMAND/OP_COMMANDREPLY
Bug SERVER-18843: resmoke.py should not summarize all previous executions until it finishes
Bug SERVER-18859: Logging before dynamic initializers have run in thread_name.cpp leaks memory
Bug SERVER-17259: Coverity analysis defect 56350: Dereference null return value
Task SERVER-18996: Implement getAllShards for RS Catalog Manager and write accompanying tests
Task SERVER-19005: Support C++ death tests which test that the process terminates abnormally
Bug SERVER-19033: find command should validate 1st parameter
Task SERVER-18815: Shard object lifetime shoud be managed by the ShardRegistry
Task SERVER-18947: Implement getCollection in the replica set catalog manager
New Feature SERVER-18980: Include wiredtiger_ext.h in mongo integration
Bug SERVER-18974: dropCollection fails because setShardVersion request is incorrect
Bug SERVER-18976: replset_dist_lock_manager_test deadlock
Task SERVER-18780: decrease the timeout for selecting syncsource back to the original 30 seconds in server6733.js
Task SERVER-18949: Implement getDatabase in the replica set catalog manager
New Feature SERVER-18811: Improve OpenSSL crypto wrapper (Enterprise)
Task SERVER-18809: Community portion of ESE project
Bug SERVER-18939: Using /localhost to configure mongos causes segfault
Bug SERVER-19028: CommandRequest constructor should validate database name
Improvement SERVER-18870: AND_SORTED and AND_HASH may never have a non-null filter
Task SERVER-18551: Get an Evergreen project running with spidermonkey as the js-engine
Improvement SERVER-6686: xtime_get() method is deprecated
Bug SERVER-18143: Coverity analysis defect 72592: Argument cannot be negative
Bug SERVER-18309: Sparse indexes should not be assigned to {$in: [null, ...]} predicates
Task SERVER-18929: Add method to get how many bytes can be written in to ReplyBuilderInterface
New Feature SERVER-5044: $stdDev aggregation operator for standard deviation
Task SERVER-18292: Implement OP_COMMAND in mongos
Task SERVER-18236: Refactor metadata to use OP_COMMAND metadata object
Improvement SERVER-18991: Standardize on MONGO_DISALLOW_COPYING
Task SERVER-18385: implement dryrun elections
Improvement SERVER-17789: Remove options influenced variant directory generation
Task SERVER-18464: Move per-shard connection management to Shard
Task SERVER-18437: Improve Concurrency of Sharding registry
Bug SERVER-18053: Building with the enterprise module should error out if SSL is not enabled
Bug SERVER-18910: Path in distribution does not contain version
Task SERVER-18943: Test framework for Catalog Manager Replica set
Improvement SERVER-18797: Enable FSM sharded replication
Bug SERVER-18933: Resmoke doesn't honor --continueOnFailure in ASAN builds
Improvement SERVER-17858: Partial indexes should support more complex queries
Task SERVER-16912: Complete the implementation of GeoMatchExpression::equivalent()
Bug SERVER-13008: Encoding of projection for query plan cache should be type-insensitive
Bug SERVER-18376: Interface changes for SERVER-18099 broke C# 1.0 drivers from access to 3.1.x servers
Improvement SERVER-18588: Adjust read-after-optime interface
Bug SERVER-18736: Coverity analysis defect 72719: Dereference null return value
Task SERVER-18632: Sign build artifacts with 3.2 server key
Bug SERVER-19110: Ignore failed operations in mixed_storage_version_replication.js
Improvement SERVER-19052: Remove sizeStorer recalculations at startup with WiredTiger
New Feature SERVER-18898: separate evergreen project for collecting mongo-perf benchmarks
Task SERVER-18554: implement OP_COMMAND logging
Sub-task SERVER-18391: SERVER-18389 Remove PyYAML installation code from evergreen.yml
Task SERVER-19120: switch jscore_op_command to jscore_op_query now that we use OP_COMMAND by default
Improvement SERVER-19130: Specify Oplog size for mongo-perf benchmarks running with oplog
New Feature SERVER-4589: aggregation: need an array indexing operator
New Feature SERVER-14421: Support minDistance for $geoNear aggregation operator
Improvement SERVER-14872: Aggregation pipeline project expression operator to concatenate multiple arrays into one
Task SERVER-18868: Make startParallelShell() assert that the exit code is 0 by default
Bug SERVER-19127: unittest::Test::stopCapturingLogMessages has a sometimes fatal race condition
Bug SERVER-18979: Duplicate uassert & fassert codes
Bug SERVER-16790: Lengthy pauses associated with checkpoints under WiredTiger
Bug SERVER-18714: Coverity analysis defect 72703: Redundant test
New Feature SERVER-16737: support eviction_dirty_trigger for WiredTiger
Bug SERVER-19070: scons lint fails while downloading clang-format
Task SERVER-18153: Implement command repldata responses
Task SERVER-19010: support sending and receiving metadata in RemoteCommandRunner
Improvement SERVER-18717: compose electionId in OID format from term
Task SERVER-19035: Implement OP_COMMAND autodetection in the clientdriver
Task SERVER-18570: Add getters for Message _buf and _data
Task SERVER-19117: Implement asynchronous replication NetworkInterface
Task SERVER-19164: Enable /bigobj compiler option for Windows debug builds
Bug SERVER-18086: canonical_query_test helper parseNormalize() keeps pointers to memory inside freed BSONObj
Bug SERVER-15017: benchRun might return incorrect stats values
Bug SERVER-19004: mongos segfault with master nightly in Jenkins
Bug SERVER-17078: show databases taking extraordinarily long with wiredTiger
Task SERVER-18036: DataReplicator: Add steady state skeleton
Bug SERVER-19079: WiredTiger changes for MongoDB 3.1.5
Sub-task SERVER-19016: SERVER-18436 RS Catalog Manager implementation of user management command running
Sub-task SERVER-19021: SERVER-18436 RS Catalog Manager implementation of special config-only write methods (logAction, logChange, and applyChunkOpsDeprecated)
Sub-task SERVER-18596: SERVER-18525 Implement lock expiration takeover for replSets distlock manager
Sub-task SERVER-18589: SERVER-18525 Implement Dist Lock Catalog
Bug SERVER-17386: Cursor cache causes excessive memory utilization in WiredTiger
Bug SERVER-18838: DB fails to recover creates and drops after system crash
Task SERVER-19115: Clean up how we launch async operations in catalog manager unit tests to prevent deadlocks on assertion failures
Bug SERVER-18911: Update source tarball push
Bug SERVER-18962: Fatal assertion on profiling-enabled secondary when dropping system.profile collection on primary
Bug SERVER-18829: Cache usage exceeds configured maximum during index builds under WiredTiger
Bug SERVER-2454: Queries that are killed during a yield should return error to user instead of partial result set
Bug SERVER-19059: mismatch in protocolVersion field
Bug SERVER-19051: Cleanup memory allocated by SSLThreadInfo
Bug SERVER-19034: log command failures at level 1
Bug SERVER-19040: WhereMatchExpression::shallowClone can leak memory during interruption
Bug SERVER-19046: myTerminate terminate handler self deadlocks when re-entered
Bug SERVER-18977: Initscript does not stop a running mongod daemon
Task SERVER-17988: KMIP - client messaging API implementation
Bug SERVER-18485: Missing language aliases for experimental RLP languages
Improvement SERVER-19054: Don't be too chatty about periodic tasks taking a few ms
Improvement SERVER-18662: Refactor SSLManager's Constructor for Better Memory Management
Improvement SERVER-3495: Include sparse/attr in explain output
Bug SERVER-18873: Wrong value used in applyUntilAndPause uassert message
Improvement SERVER-15732: Abort election if term increases
Task SERVER-19002: Remove variantdir options from evergreen yaml files
Bug SERVER-18881: Limit with explain("executionStats") has limitAmount as 0
Improvement SERVER-9435: mongoutils::str::stripTrailing() is misnamed
Bug SERVER-18830: Explain on near query with limit leaves out last search interval
Bug SERVER-18894: OSX SSL builds should use unique filename
Bug SERVER-18998: UnboundLocalError when building with --sanitize=thread and without --llvm-symbolizer
Improvement SERVER-18501: Improve error message when server fails to start due to unsupported text index language
Improvement SERVER-10176: Implement $abs (absolute value) operator for aggregation framework
Improvement SERVER-19106: remove 'extra' variable from OpDebug
Question SERVER-18795: db.printSlaveReplicationInfo()/rs.printSlaveReplicationInfo() can not work with ARBITER role
Improvement SERVER-18660: Add C++11 final and override specifiers where appropriate in aggreggation classes
Improvement SERVER-19135: Tune default cache size settings for WiredTiger
Bug SERVER-19045: don't throw non-exceptions
Bug SERVER-18446: Improve error message when RLP's processBuffer function fails
Bug SERVER-18574: Typo in RLP error message when failing to create language context
Bug SERVER-18578: ErrorCodes::InternalError used for public facing messages in RLP code
Bug SERVER-18397: Lower the log level of the "Skipping RLP Initialization" message
Improvement SERVER-18502: Remove unused RLP declarations

New in MongoDB 3.1.4 Dev (Jun 17, 2015)

Bug SERVER-18213: Lots of WriteConflict during multi-upsert with WiredTiger storage engine
Bug SERVER-17923: Creating/dropping multiple background indexes on the same collection can cause fatal error on secondaries
Bug SERVER-18629: WiredTiger journal system syncs wrong directory
Bug SERVER-18316: Database with WT engine fails to recover after system crash
Sub-task SERVER-18526: SERVER-18525 Create mock for command exec and targeter
Task SERVER-18039: Add Initial Sync Skeleton to DataReplicator
Sub-task SERVER-18491: SERVER-17858 Add support for $or query to be answered by partial index
Sub-task SERVER-18591: SERVER-18525 Implement background ping and unlock for replSets distlock manager
Bug SERVER-18739: Replication unit tests fail when run in parallel
Bug SERVER-18695: ElectionWinnerDeclarer::Algorithm::processResponse can call getValue() on non-OK StatusWith
Task SERVER-18478: Clean up AuthzManagerExternalState
Task SERVER-18291: Create a variant of the jscore suite for OP_COMMAND
Improvement SERVER-18748: Move cursor response generation functions to be under query
Improvement SERVER-18611: add non-static data member initializers to LiteParsedQuery
Improvement SERVER-18515: Make OperationContext useful in mongos
Bug SERVER-18804: Invariant failure when running explained update against config or admin db in sharded cluster
Improvement SERVER-13990: Improved warning for low cardinality keys
Bug SERVER-18580: jsobj (dbtest): JsobjTests::OIDTests::FromDate failure
Improvement SERVER-18365: Get rid of MatchExpression::NIN match type
Improvement SERVER-14995: OperationContext should have a constant id for whole lifetime
Task SERVER-17660: Rename index option "filter" to "partialFilterExpression"
Task SERVER-18152: V1 repl election protocol commands
Task SERVER-18216: Add term to oplog
Task SERVER-18033: Data Replicator: Pause/Resume
Bug SERVER-18600: resmoke.py should avoid assigning duplicate ports to mongod processes
Improvement SERVER-16265: Add query details to getmore entry in profiler and db.currentOp()
Bug SERVER-18673: ScopedThreads used by parallel suite do not get TestData configuration
Improvement SERVER-18799: Reduce flakiness of max_time_ms.js
Bug SERVER-17526: option to allow disabling job object creation in smoke.py for win32
Bug SERVER-18582: Coverity analysis defect 72708: PW.PARAMETER_HIDDEN
Improvement SERVER-18495: Enable FSM replication tests
Bug SERVER-18813: ClusterPipelineCmd can fail to throw RecvStaleConfigException when merging cursors
Bug SERVER-18827: repl1.js repl6.js failure
Improvement SERVER-18280: ReplicaSetMonitor should use electionId to avoid talking to old primaries
Bug SERVER-18157: Coverity analysis defect 72637: Inferred misuse of enum
Bug SERVER-18806: CPU profiler commands cannot find gperftools header files
Task SERVER-18462: Apply FSM capped collection patch
Task SERVER-18032: Data Replicator: flushAndPause
Task SERVER-18563: DataReplicator: Limit the buffered ops size
Bug SERVER-18461: Range predicates comparing against a BinData value should be covered, but are not in 2.6
Bug SERVER-6826: Potential memory leak in ConnectionString::connect
Bug SERVER-18737: Balancer::run can call getValue() on non-OK StatusWith
Bug SERVER-18617: resmoke.py should not error when attempting to tear down fixtures which have not been set up.
Improvement SERVER-18605: Include thread id in log messages
Task SERVER-17607: Hook OP_COMMAND/OP_COMMANDREPLY into mongod command dispatch/response logic
Task SERVER-18127: Get rid of the ConfigServer class and global configServer variable
Bug SERVER-6801: aggregation $substr expression can output invalid UTF8
Bug SERVER-18504: "Lock for createDatabase is taken" triggered by mongorestore restoring multiple collections in parallel
Improvement SERVER-18371: Add SSL library config detection
Improvement SERVER-18667: Remove the ReplicaSetMonitor remembered seed list
Improvement SERVER-18007: StatusWith should work with non-default constructible T
Task SERVER-17575: Handle BSONObj size limits for find/getMore commands
Task SERVER-18254: implement heartbeat protocol portion of the new election protocol
Task SERVER-18569: Get ASIO vendored into third_party on master
Task SERVER-18848: enable perf statistics collection in evergreen
Bug SERVER-18825: dropDatabase command provides no indication of whether database existed
Improvement SERVER-18621: Remove concurrency_compat tests for FSM
Task SERVER-18297: replace all uses of db.$cmd.findOne() with db.runCommand in shell js and jstests
Bug SERVER-18669: primary should step down if it sees a higher term in new consensus protocol
Improvement SERVER-18445: Define the aggregation suite to include everything in jstests/aggregation/bugs/, and remove jstests/aggregation/testbugs.js
Task SERVER-17608: Implement OP_COMMAND/OP_COMMANDREPLY in the shell
Improvement SERVER-4444: Make replica sets (Applier) more testable
Bug SERVER-18481: Fix tcmalloc patch to be upstream-able
Bug SERVER-18801: multi_host_query_test suite is non-deterministic
Bug SERVER-18482: db.currentOp(True) does not return client information on idle connections
Bug SERVER-18738: FindAndModifyCommand::run can create an invalid StatusWith
Task SERVER-18599: resmoke.py should wait longer for mongod to start
Improvement SERVER-18664: Refactor command error handling
Bug SERVER-18355: awaitReplication may not wake up and timeout when maxTimeMs runs out.
Improvement SERVER-18487: shell helper getCollectionInfos should take optional query
Improvement SERVER-18016: Add Data Replicator Applier skeleton
Improvement SERVER-18031: Data Replicator : resync
Improvement SERVER-17310: Provide stdx polyfills for std:: implementation of boost concurrency types
Improvement SERVER-18215: DataReplicator Applier: Always disable unique index constraints
Improvement SERVER-18486: delete copy constructor/assignment operator in MONGO_DISALLOW_COPYING
Task SERVER-18634: Move legacy catalog manager schema upgrade code inside CatalogManagerLegacy
Task SERVER-18035: Data Replicator: Refactor Rollback Code
Bug SERVER-17747: FreeBSD 11.0-CURRENT build issue
Improvement SERVER-18444: Improve explain output of aggregation command in sharded cluster
Bug SERVER-18514: Improve Multi-Word Term Search performance with RLP
Bug SERVER-18527: Coverity analysis defect 72699: PW.PARAMETER_HIDDEN
Bug SERVER-18635: transitioning_to_and_from_WT.js should test upgrading from 3.0 to 3.1.x
Task SERVER-18587: Move ReadPreference to a separate library
Improvement SERVER-18499: Move ConfigDiffTracker to a separate .cpp file
Improvement SERVER-17664: Add collection/oplog Fetcher to Data Replicator
Bug SERVER-8728: jstests/profile1.js is a race and fails randomly
Bug SERVER-18764: Only use elapsedMillis when command succeeds
Bug SERVER-18129: Coverity analysis defect 72415: Unchecked return value
Bug SERVER-13237: benchRun should use a thread-safe random number generator
Sub-task SERVER-18390: SERVER-18389 Check dbhash of all databases during core_small_oplog and core_small_oplog_rs
Bug SERVER-18178: Fix mr_drop.js test to not fail from nondeterministic collection drop timing
Task SERVER-18037: DataReplicator Applier: add applyUntilAndPause behavior
Bug SERVER-18792: Secondaries fassert when replicating createCollection op with missing size value
Task SERVER-17861: Change default for --storageEngine in development release
Task SERVER-17577: Allow the query system to make use of differentiating between batchSize and limit
Task SERVER-17774: Cleanup the parsing of ChunkType and move it under catalog/
Sub-task SERVER-18590: SERVER-18525 Implement lock & unlock for replSets distlock manager
Task SERVER-18616: Rename remoteCommandExecutor to remoteCommandRunner
Improvement SERVER-7656: Optimize aggregation on sharded setup if first stage is exact match on shard key
Task SERVER-18184: Add awaitData support to getMore command
Bug SERVER-16311: WiredTiger: lsm-worker: LSM metadata write: Cannot allocate memory
Improvement SERVER-17329: Improve management of server version in build system
Improvement SERVER-17782: Generate source tarballs with pre-interpolated version metadata files from SCons
Bug SERVER-18573: Change the casing of the basisTech.RootDirectory YAML config option
Improvement SERVER-18597: Add support for dumping ASan code coverage data
Task SERVER-18568: Remove ConnectionString::PAIR
Bug SERVER-18529: registerRlpLanguages return code is ignored in RLP initializer
Bug SERVER-16741: Unable to create wiredTiger database with name containing ASCII control character with directoryperdb
Task SERVER-18798: Move FindAndModifyRequest to the request/response library
Bug SERVER-18696: Typo in RLP error message when failing to initialize RLP environment
Bug SERVER-18423: Typo in aggregation $map and $filter error messages

New in MongoDB 3.0.4 (Jun 17, 2015)

New in MongoDB 3.0.3 (May 13, 2015)

Highlights:
Deprecate db.eval() and add warnings: SERVER-17453
Fix potential for abrupt termination with the Windows service stop operation: SERVER-17802
Fix crash caused by update with a key too large to index on WiredTiger and RocksDB storage engines: SERVER-17882
Remove inconsistent support for mapReduce in eval environment: SERVER-17889
Fixed issues:
Task SERVER-18344: logs should be sent to updated logkeeper server
Bug SERVER-18304: duplicates on FindAndModify with remove option
Bug SERVER-18302: remove test buildlogger instance
Bug SERVER-18299: Use ld wrapper for compiling Enterprise GO tools in RHEL 5
Task SERVER-18293: ASAN tests should run on larger instance size
Bug SERVER-18290: Adding a read role for a user doesn't seem to propagate to secondary until restart
Bug SERVER-18262: setup_multiversion_mongodb should retry links download on timeouts
Bug SERVER-18239: dumpauth.js uses ambiguous --db/--collection args
Bug SERVER-18229: Smoke.py with PyMongo 3.0.1 fails to run certain tests
Bug SERVER-18211: MongoDB fails to correctly roll back collection creation
Bug SERVER-18205: WiredTiger changes for MongoDB 3.0.3
Bug SERVER-18192: Crash running WiredTiger with "cache_resident=true"
Bug SERVER-18169: Regression: Auth enabled arbiter cannot be shutdown using command
Bug SERVER-18140: Allow getParameter to be executed locally against an arbiter in an authenticated replica set
Bug SERVER-18111: mongod allows user inserts into system.profile collection
Bug SERVER-18087: index_retry.js and index_no_retry.js not checking for presence of "progress" field in currentOp() result
Improvement SERVER-18082: Change smoke.py buildlogger command line options to environment variables
Bug SERVER-18073: Fix smoke.py to work with pymongo 3.0
Bug SERVER-18051: OpenSSL internal error when using SCRAM-SHA1 authentication in FIPS mode
Bug SERVER-18021: Allow serverStatus to be executed locally against an arbiter in an authenticated replica set
Bug SERVER-18014: Dropping a collection can block creating a new collection for an extended time under WiredTiger
Bug SERVER-17998: Ignore socket exceptions in initial_sync_unsupported_auth_schema.js test
Bug SERVER-17961: THIRD-PARTY-NOTICES.windows needs to be updated
Bug SERVER-17951: db.currentOp() fails with read preference set
Improvement SERVER-17939: Backport mongo-rocks updates to v3.0 branch
Bug SERVER-17908: Allow getCmdLineOpts to be executed locally against an arbiter in an authenticated replica set
Bug SERVER-17907: B-tree eviction blocks access to collection for extended period under WiredTiger
Improvement SERVER-17892: Explicitly turn checksum on for all collections/indexes in WiredTiger by default
Bug SERVER-17889: Using eval command to run mapReduce with non-inline "out" option triggers fatal assertion failure
Bug SERVER-17882: Update with key too large to index crashes WiredTiger/RockDB secondary
Bug SERVER-17835: Aggregation geoNear deprecated uniqueDocs warning
Bug SERVER-17832: Memory leak when MongoD configured with SSL required and handle insecure connection
Bug SERVER-17820: Windows service stop can lead to mongod abrupt termination due to long shutdown time
Bug SERVER-17815: Plan ranking tie breaker is computed incorrectly
Bug SERVER-17812: LockPinger has audit-related GLE failure
Bug SERVER-17780: Init script sets process ulimit to different value compared to documentation
Bug SERVER-17761: RestAdminAccess/NoAdminAccess objects leak at shutdown
Bug SERVER-17749: collMod usePowerOf2Sizes fails on mongos
Improvement SERVER-17745: Improve dirty page estimation in mmapv1 on Windows
Bug SERVER-17730: Parsing of Variables on Windows doesn't respect windows conventions
Improvement SERVER-17694: support RPATH=value in top-level SConstruct
Improvement SERVER-17591: Add SSL flag to select supported protocols
Bug SERVER-17465: --use-system-tcmalloc does not support tcmalloc setParameters and extension
Task SERVER-17453: warn that db.eval() / eval command is deprecated
Improvement SERVER-17273: Add support for secondaryCatchupPeriodSecs to rs.stepdown shell helper
Bug SERVER-16987: sh.getRecentMigrations shows aborted migration as success
Bug SERVER-16636: Deadlock detection should check cycles for stability or should be disabled
Bug SERVER-16073: Allow disabling SSL Ciphers via hidden flag: sslCipherConfig
Improvement SERVER-12235: Don't require a database read on every new localhost connection when auth is on
Improvement SERVER-9220: allow more than two values in the coordinate-array when using 2dsphere index

New in MongoDB 3.1.2 Dev (Apr 30, 2015)

Bug SERVER-17972: basic.js/basicPlus.js in the parallel suite and durability_passthrough are broken
Bug SERVER-17689: Server crash during initial replication sync
Bug SERVER-17907: B-tree eviction blocks access to collection for extended period under WiredTiger
Bug SERVER-18201: disk/repair5.js fails intermittently
Task SERVER-17723: Sharding catalog cache
Bug SERVER-17832: Memory leak when MongoD configured with SSL required and handle insecure connection
Improvement SERVER-18064: Move shard.cpp under the sharding client library
Improvement SERVER-18072: Pull ShardingConnectionHook into its own library
Improvement SERVER-18080: Move cluster commands out of mongoscore
Bug SERVER-17961: THIRD-PARTY-NOTICES.windows needs to be updated
Bug SERVER-17964: sharding_jscore_passthrough.js test should only start with one shard
Task SERVER-17775: Cleanup the parsing of ShardType and move it under catalog/
Bug SERVER-18051: OpenSSL internal error when using SCRAM-SHA1 authentication in FIPS mode
Improvement SERVER-18101: Remove usage of default_version.cpp
Bug SERVER-17815: Plan ranking tie breaker is computed incorrectly
Bug SERVER-17455: Configure checks for __atomic and __sync should verify all required functions
Bug SERVER-15901: Cleanup unused locks on the lock manager
Bug SERVER-17447: Failed to build on Linux i686 with clang
Bug SERVER-17514: Don't close handles until a threshold of in-use handles has been reached
Improvement SERVER-17781: Add SCons Variables for C and C++ compiler
Improvement SERVER-17909: move RunOnAllShardsCommand to a separate file
Task SERVER-17620: RLP Tokenizer (includes C++ unit tests)
Improvement SERVER-17770: CollectionLock::relockWithMode() shouldn't relock database
Sub-task SERVER-17876: SERVER-17865 Coverity analysis defect 71768: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Bug SERVER-17328: Add class invariant that collection exists to MultiPlanStage/SubplanStage/CachedPlanStage
Improvement SERVER-17986: Allow Variables based configuration of the ENV scons variable
Task SERVER-17621: RLP English Testability hooks & JS unit tests
Improvement SERVER-17993: Stop using end cursor in WiredTigerIndexCursors
Task SERVER-18070: Split ConnectionString out of dbclientinterface and into its own file
Improvement SERVER-17718: change showDiskLoc to showRecordId
Bug SERVER-18224: jsCore_small_oplog test times out on Ubuntu with RocksDB
Task SERVER-17968: Move configServer.allUp to the catalog manager
Task SERVER-17774: Cleanup the parsing of ChunkType and move it under catalog/
Bug SERVER-17900: decorable compilation warnings on VS2013
Bug SERVER-18199: WiredTiger changes for MongoDB 3.1.2
Task SERVER-17932: Ensure passthrough tests are resilient to the tests they run overriding global variables
Improvement SERVER-17880: Convert OpTime -> Timestamp, make new OpTime
Task SERVER-17938: Don't send test output to /dev/null in sync6.js test
Bug SERVER-17901: Memory leak in IndexCatalog::_isSpecOk()
Bug SERVER-17917: Config DB gets updated even though the user has no permissions
Task SERVER-17931: change downgrade_replset.js to use latest stable instead of 2.6
Task SERVER-18024: Move collection metadata manipulation under the catalog manager
Task SERVER-18055: Move legacy config server upgrade to the legacy catalog manager
Task SERVER-18009: Move collection drop to the catalog manager
Improvement SERVER-17897: Add a way to opt out of building modules
Bug SERVER-18078: logOp fassert when running mapReduce during primary step-down
Bug SERVER-17898: Intermittent config server check failures (uncovered by 4_upgrade_cluster.js)
Bug SERVER-17918: mixed_storage_version_replication.js
Bug SERVER-18147: Take distributed lock on database creation
Sub-task SERVER-17874: SERVER-17865 Coverity analysis defect 20291: PW.PARAMETER_HIDDEN
Improvement SERVER-15207: Return errors from commands during replication
Bug SERVER-17933: Invalid database name check should not cause the connection to be closed
Task SERVER-18110: Add Reporter to Data Replicator
Bug SERVER-17962: turn on task stepback for mongodb-master
Sub-task SERVER-17867: SERVER-17865 Coverity analysis defect: Unchecked return value
Improvement SERVER-14750: Convert RPM and DEB mongod.conf files to new YAML format
Bug SERVER-15047: Timestamp class relies on undefined behavior
Task SERVER-17606: Implement OP_COMMAND/OP_COMMANDREPLY message serialization/deserialization
Task SERVER-17450: Replace all instances of startMongod in jstest code with MongoRunner.runMongod
Task SERVER-17800: remove dead auditing functions for pseudo-commands
Bug SERVER-18176: Add RLP tasks to MCI
Improvement SERVER-17802: add fassertStatusOK for StatusWith
New Feature SERVER-17957: Create OpenSSL EVP crypto wrapper for AES
Improvement SERVER-15225: CachedPlanStage should execute for trial period and re-plan if query performs poorly
Bug SERVER-17866: Make minimum Windows build version Vista/2008
Task SERVER-18121: Move action logging to the catalog manager
Bug SERVER-17817: Consolidate Client, ClientBasic and ClientInfo into one type
Improvement SERVER-18108: catch boost::exception in our terminate handler
Improvement SERVER-10909: Replace jstest calls to MongodRunner
Improvement SERVER-18023: Don't await commit when applying logops in initial sync
Task SERVER-18071: mongosGlobalParams.configdbs should be a ConnectionString, not a vector of host strings
Improvement SERVER-18177: _getReplicationMode_inlock is both misleading and unnecessary as no mutex is required to read _replMode
Sub-task SERVER-17875: SERVER-17865 Coverity analysis defect 48577: Redundant test
Bug SERVER-18052: Race condition in collection_cloner_test
Task SERVER-17848: Use the catalog manager to query shards in a sharded cluster
Bug SERVER-17566: Remove PCRE defines from SConstruct
Task SERVER-17894: Add Collection Cloner to Data Replicator
Improvement SERVER-17823: Raise compiler minimum check to VS2013 Update 4
Improvement SERVER-17635: Improve SortedDataInterface::Cursor API
Task SERVER-17657: Ensure filter/sparse combination is illegal
Bug SERVER-18054: Crash when running findAndModify against non-existent collection
Improvement SERVER-16063: Rewrite findAndModify
Bug SERVER-17946: Segfault when running sharding dbtest
Sub-task SERVER-17868: SERVER-17865 Coverity analysis defect 17143: Resource leak
New Feature SERVER-17919: Add support for emitting a compilation database from SCons
Sub-task SERVER-17870: SERVER-17865 Coverity analysis defect 29897: Copy without assign
Task SERVER-18122: Move sharding global settings retrieval to the catalog manager
Improvement SERVER-7775: Make special commands (inprog, killop, unlock) go through the standard command codepath
Improvement SERVER-17496: Cleanup and modularize sharding code
Bug SERVER-17034: Deadlock between poorly-formed copydb and reading admin.system.users for localhost exception check
Improvement SERVER-17633: Public static methods in Explain class should take in-arguments as const
Improvement SERVER-17573: move collection creation OpObserver::onCreateCollection down into createCollection, et cetera
Task SERVER-18133: Make LogstreamBuilder truly movable
Task SERVER-18015: Add Database Cloner to Data Replicator
Task SERVER-18104: Prevent mongos from starting when pointing to a standalone config server
Task SERVER-17969: Move shardCollection to the catalog manager
Improvement SERVER-17910: Remove unused test in db.cpp
Improvement SERVER-17971: Improve test infrastructure to allow ShardingTest to use a replica set for the config servers
Improvement SERVER-17803: Constructing an error StatusWith should not require copy of Status/std::string
Improvement SERVER-15860: Switch replication metadata ops to be replication-specific, rather than using commands
Task SERVER-17755: Remove legacy code from build system
Bug SERVER-17954: Coverity analysis defect 72085: Redundant test
Task SERVER-17760: moveChunk, mergeChunk, splitChunk commands should use catalog manager to connect to config servers
Task SERVER-17619: RLP library loading
Task SERVER-17772: listDatabases command should use the catalog manager
New Feature SERVER-17965: Allow using a single node replica set as a config server
Improvement SERVER-17662: Add initial Data Replicator interface
Bug SERVER-17948: Coverity analysis defect 72088: Redundant test
Improvement SERVER-17864: boost::optional triggers spurious -Wmaybe-uninitialized warnings on g++
Improvement SERVER-18050: handle boost exceptions in exceptionToStatus
Bug SERVER-17951: db.currentOp() fails with read preference set
Bug SERVER-17889: Using eval command to run mapReduce with non-inline "out" option triggers fatal assertion failure
Bug SERVER-17882: Update with key too large to index crashes WiredTiger/RockDB secondary
Bug SERVER-17908: Allow getCmdLineOpts to be executed locally against an arbiter in an authenticated replica set
Improvement SERVER-17591: Add SSL flag to select supported protocols
Bug SERVER-18239: dumpauth.js uses ambiguous --db/--collection args
Bug SERVER-18021: Allow serverStatus to be executed locally against an arbiter in an authenticated replica set
Bug SERVER-18229: Smoke.py with PyMongo 3.0.1 fails to run certain tests
Bug SERVER-17998: Ignore socket exceptions in initial_sync_unsupported_auth_schema.js test
Bug SERVER-18073: Fix smoke.py to work with pymongo 3.0
Task SERVER-18097: Remove mongosTest_auth and mongosTest_WT tasks from evergreen.yml
Improvement SERVER-17332: getmore/query logging/profiling should indicate cursor exhaustion
Improvement SERVER-18102: Remove ServerAndQuery
Bug SERVER-18192: Crash running WiredTiger with "cache_resident=true"
Bug SERVER-17937: Remove the 'exception: ' prefix to errors returned from command processing
Bug SERVER-18087: index_retry.js and index_no_retry.js not checking for presence of "progress" field in currentOp() result

New in MongoDB 3.0.1 (Mar 21, 2015)

New in MongoDB 3.0.0 (Mar 10, 2015)

Key features include support for the WiredTiger storage engine, pluggable storage engine API, SCRAM-SHA-1 authentication mechanism, and improved explain functionality.
MongoDB Ops Manager, which includes Automation, Backup, and Monitoring, is now also available. See the Ops Manager documentation and the Ops Manager release notes for more information.
Major Changes:
Pluggable Storage Engine API - MongoDB 3.0 introduces a pluggable storage engine API that allows third parties to develop storage engines for MongoDB.
WiredTiger - MongoDB 3.0 introduces support for the WiredTiger storage engine. With the support for WiredTiger, MongoDB now supports two storage engines:
MMAPv1, the storage engine available in previous versions of MongoDB and the default storage engine for MongoDB 3.0, and
WiredTiger, available only in the 64-bit versions of MongoDB 3.0.
WiredTiger Usage:
WiredTiger is an alternate to the default MMAPv1 storage engine. WiredTiger supports all MongoDB features, including operations that report on server, database, and collection statistics. Switching to WiredTiger, however, requires a change to the on-disk storage format. For instructions on changing the storage engine to WiredTiger, see the appropriate sections in the Upgrade MongoDB to 3.0 documentation.
MongoDB 3.0 replica sets and sharded clusters can have members with different storage engines; however, performance can vary according to workload. For details, see the appropriate sections in the Upgrade MongoDB to 3.0 documentation.
The WiredTiger storage engine requires the latest official MongoDB drivers. For more information, see WiredTiger and Driver Version Compatibility.
WiredTiger Configuration:
To configure the behavior and properties of the WiredTiger storage engine, see storage.wiredTiger configuration options. You can set WiredTiger options on the command line.
WiredTiger Concurrency and Compression:
The 3.0 WiredTiger storage engine provides document-level locking and compression.
By default, WiredTiger compresses collection data using the snappy compression library. WiredTiger uses prefix compression on all indexes by default.
MMAPv1 Improvements:
MMAPv1 Concurrency Improvement - In version 3.0, the MMAPv1 storage engine adds support for collection-level locking.
MMAPv1 Configuration Changes - To support multiple storage engines, some configuration settings for MMAPv1 have changed. See Configuration File Options Changes.
MMAPv1 Record Allocation Behavior Changes - MongoDB 3.0 no longer implements dynamic record allocation and deprecates paddingFactor. The default allocation strategy for collections in instances that use MMAPv1 is power of 2 allocation, which has been improved to better handle large document sizes. In 3.0, the usePowerOf2Sizes flag is ignored, so the power of 2 strategy is used for all collections that do not have noPadding flag set.
For collections with workloads that consist only of inserts or in-place updates (such as incrementing counters), you can disable the power of 2 strategy. To disable the power of 2 strategy for a collection, use the collMod command with the noPadding flag or the db.createCollection() method with the noPadding option.
Warning:
Do not set noPadding if the workload includes removes or any updates that may cause documents to grow. For more information, see No Padding Allocation Strategy.
When low on disk space, MongoDB 3.0 no longer errors on all writes but only when the required disk allocation fails. As such, MongoDB now allows in-place updates and removes when low on disk space.
Replica Sets:
Increased Number of Replica Set Members - In MongoDB 3.0, replica sets can have up to 50 members. [1] The following drivers support the larger replica sets:
C# (.NET) Driver 1.10
Java Driver 2.13
Python Driver (PyMongo) 3.0+
Ruby Driver 2.0+
Node.JS Driver 2.0+
Because the C, C++, Perl, PHP, and earlier versions of the Ruby, Python, and Node.JS drivers discover and monitor replica set members serially, these drivers are not suitable for use with large replica sets.
Pymongo 3.0, the Ruby Driver 2.0, and the Node.JS Driver 2.0 are currently in development.
The maximum number of voting members remains at 7.
Replica Set Step Down Behavior Changes:
The process that a primary member of a replica set uses to step down has the following changes:
Before stepping down, replSetStepDown will attempt to terminate long running user operations that would block the primary from stepping down, such as an index build, a write operation or a map-reduce job.
To help prevent rollbacks, the replSetStepDown will wait for an electable secondary to catch up to the state of the primary before stepping down. Previously, a primary would wait for a secondary to catch up to within 10 seconds of the primary (i.e. a secondary with a replication lag of 10 seconds or less) before stepping down.
replSetStepDown now allows users to specify a secondaryCatchUpPeriodSecs parameter to specify how long the primary should wait for a secondary to catch up before stepping down.
Other Replica Set Operational Changes:
Initial sync builds indexes more efficiently for each collection and applies oplog entries in batches using threads.
Definition of w: “majority” write concern changed to mean majority of voting nodes.
Stronger restrictions on Replica Set Configuration. For details, see Replica Set Configuration Validation.
For pre-existing collections on secondary members, MongoDB 3.0 no longer automatically builds missing _id indexes.
Sharded Clusters:
MongoDB 3.0 provides the following enhancements to sharded clusters:
Adds a new sh.removeTagRange() helper to improve management of sharded collections with tags. The new sh.removeTagRange() method acts as a complement to sh.addTagRange().
Provides a more predictable read preference behavior. mongos instances no longer pin connections to members of replica sets when performing read operations. Instead, mongos reevaluates read preferences for every operation to provide a more predictable read preference behavior when read preferences change.
Provides a new writeConcern setting to configure the write concern of chunk migration operations. You can configure the writeConcern setting for the balancer as well as for moveChunk and cleanupOrphaned commands.
Improves visibility of balancer operations. sh.status() includes information about the state of the balancer. See sh.status() for details.
Security Improvements:
MongoDB 3.0 includes the following security enhancements:
Adds a new SCRAM-SHA-1 challenge-response user authentication mechanism.
Increases restrictions when using the Localhost Exception to access MongoDB. For details, see Localhost Exception Changed.
Security Changes:
Improvements:
New Query Introspection System - MongoDB 3.0 includes a new query introspection system that provides an improved output format and a finer-grained introspection into both query plan and query execution.
For details, see the new db.collection.explain() method and the new explain command as well as the updated cursor.explain() method.
For information on the format of the new output, see Explain Results.
Enhanced Logging - To improve usability of the log messages for diagnosis, MongoDB categorizes some log messages under specific components, or operations, and provides the ability to set the verbosity level for these components. For information, see Log Messages.
MongoDB Tools Enhancements - All MongoDB tools are now written in Go and maintained as a separate project.
New options for parallelized mongodump and mongorestore. You can control the number of collections that mongorestore will restore at a time with the --numParallelCollections option.
New options -excludeCollection and --excludeCollectionsWithPrefix for mongodump to exclude collections.
mongorestore can now accept BSON data input from standard input in addition to reading BSON data from file.
mongostat and mongotop can now return output in JSON format with the --json option.
Added configurable write concern to mongoimport, mongorestore, and mongofiles. Use the --writeConcern option.
mongofiles now allows you to configure the GridFS prefix with the --prefix option so that you can use custom namespaces and store multiple GridFS namespaces in a single database.
MongoDB Tools Changes:
Indexes - Background index builds will no longer automatically interrupt if dropDatabase, drop, dropIndexes operations occur for the database or collection affected by the index builds. The dropDatabase, drop, and dropIndexes commands will still fail with the error message a background operation is currently running, as in 2.6.
If you specify multiple indexes to the createIndexes command, the command only scans the collection once, and if at least one index is to be built in the foreground, the operation will build all the specified indexes in the foreground.
For sharded collections, indexes can now cover queries that execute against the mongos if the index includes the shard key.
Indexes in Compatibility Changes in MongoDB 3.0:
Query Enhancements - MongoDB 3.0 includes the following query enhancements:
For geospatial queries, adds support for “big” polygons for $geoIntersects and $geoWithin queries. “Big” polygons are single-ringed GeoJSON polygons with areas greater than that of a single hemisphere. See $geometry, $geoIntersects, and $geoWithin for details.
For aggregate(), adds a new $dateToString operator to facilitate converting a date to a formatted string.
Adds the $eq query operator to query for equality conditions.
2d Indexes and Geospatial Near Queries:
Distributions - Most non-Enterprise MongoDB distributions now include support for SSL. Previously, only MongoDB Enterprise distributions came with SSL support included; for non-Enterprise distributions, you had to build MongoDB locally with the --ssl flag (i.e. scons --ssl).
MongoDB Enterprise Features:
Auditing - Auditing in MongoDB Enterprise can filter on any field in the audit message, including the fields returned in the param document. This enhancement, along with the auditAuthorizationSuccess parameter, enables auditing to filter on CRUD operations. However, enabling auditAuthorizationSuccess to audit of all authorization successes degrades performance more than auditing only the authorization failures.

New in MongoDB 2.6.8 (Feb 28, 2015)

New in MongoDB 2.6.8 RC 0 (Feb 18, 2015)

New in MongoDB 3.0.0 RC 8 (Feb 6, 2015)

Bug SERVER-17100: mongod hung running mongo-perf
Bug SERVER-17132: Index contains extra entries
Bug SERVER-17115: insert workload stalls on oplog truncates
Bug SERVER-17107: Replica set, with only one voter, invariants during election
Bug SERVER-17167: Shell breaks when a multiline function is input
Bug SERVER-17129: logOp fassert when creating namespace on stepped-down primary via legacy update
Bug SERVER-17114: WiredTiger capped collection cursor needs to go DEAD when restoreState to a deleted doc
Bug SERVER-17150: logOp fassert when dropping collection on stepped-down primary
Bug SERVER-17117: boost::lock_error in CachedPlanStage::updateCache when destructing CountStage
Bug SERVER-17067: Burst of highly contended updates causes mongod with oplog to be irresponsive
Bug SERVER-17108: Need to log member name during config loading
Bug SERVER-17097: Rocks compilation error in RocksRecoveryUnit::beginUnitOfWork
Bug SERVER-17142: corruption in sizeStorer.wt file after kill -9 on server
Task SERVER-17136: Update man pages
Bug SERVER-17094: repairing local db with WiredTiger will deadlock with the oplog cleaning thread and crash
Bug SERVER-17161: Fix Rocks build broken with getSnapshotId() virtual function
Bug SERVER-17096: Test "replsets/resync.js" should ensure first node is always primary
Bug SERVER-17123: Always stop background sync thread when we become primary
Bug SERVER-17172: Check _lastLoc for sentinel in WTRecordStore::Iterator::restoreState for capped collections
Bug SERVER-15308: Stepdown does not cancel active (background) index builds causing shutdown on completion
Bug SERVER-17181: Correctly invalidate RocksDB cursor when restoring to a deleted doc
Bug SERVER-17179: check for replicaset stepdown in cloner
Bug SERVER-16997: wiredtiger's "bytes currently in the cache" exceeds "maximum bytes configured" and eviction threads are deadlocked
Bug SERVER-17164: mongod sometimes crashes when restarting to disable auth
Bug SERVER-17185: replsets/auth1.js error handling is confusing and unhelpful
Bug SERVER-17173: 3.0 Mongos should support listCollections and listIndexes even when the shard server is running 2.6 mongod
Bug SERVER-16866: Coverity analysis defect 44225: Redundant test
Improvement SERVER-17126: Improve rocks engine
Improvement SERVER-17133: Fail verbosely when RocksDB's disk format changes

New in MongoDB 3.0.0 RC 7 (Jan 29, 2015)

Bug SERVER-17037: output of "top" command is zero on secondary running WT
Bug SERVER-17080: shutdown on secondary could lose last op applied
Bug SERVER-17056: On shutdown and database drop data files can be closed before the journal thread has finished applying
Bug SERVER-17025: Handle leak when WT enabled - Only on windows
Task SERVER-17006: Support "random" failpoint activation
Improvement SERVER-16604: Improve integration with rocks
Bug SERVER-16984: UpdateLifecycleImpl can return empty collectionMetadata even if ns is sharded
Task SERVER-15704: Re-enable resync.js
Improvement SERVER-17057: Make sure inserts succeeded in sync_conn_cmd.js before testing
Bug SERVER-17071: Resync crashes secondary
Bug SERVER-16967: WT_WITH_TABLE_LOCK assert failure during compact
Bug SERVER-16921: WT oplog bottleneck on secondary
Bug SERVER-16773: Performance degradation due to TCMalloc scalability
Bug SERVER-17068: 3.0.0-rc6 cannot build with the 3.25 JS engine
Bug SERVER-17079: stepdown_long_wait_time.js
Bug SERVER-17083: Background thread for oplog clean-up can timeout during repair (invariant failure)
Bug SERVER-17027: Inserts that create a collection can segfault if there is an ill-timed WriteConflictException
Bug SERVER-17036: db.runCommand({startupWarnings:1}) includes spurious line
Bug SERVER-17053: drop and dropIndexes commands should not return WriteConflict error to users
Bug SERVER-17061: create, createIndex, and dropDatabase should not return WriteConflict
Bug SERVER-17091: removed nodes should not attempt to create update position commands as they will segfault when trying to grab their member config from the replset config
Bug SERVER-17030: handle WCE in index builds
Bug SERVER-17028: TTL Monitor has to handle WriteConflictException
Improvement SERVER-17000: Drop the { ts: 1 } index during --upgrade
Bug SERVER-17021: Significant WT Performance Regression on "modified" FSM workload
Bug SERVER-16893: Invariant failure: out-of-order index keys with v0 WiredTiger index
Bug SERVER-17012: Server Terminates Javascript Execution for GroupStage Setup with a Timeout
Bug SERVER-17063: make filemd5 handle WriteConflictException
Improvement SERVER-16951: Restrict maximum number of in-flight operations
Bug SERVER-17077: jstests/core/evalc.js should not run indefinitely if background shell fails
Bug SERVER-17020: Evictions by eviction server threads are reported as evictions by application threads
Bug SERVER-17001: possible overflow in maxmempage calculation

New in MongoDB 3.0.0 RC 6 (Jan 24, 2015)

Bug SERVER-16959: Collection::updateDocument() issues an INVALIDATION_MUTATION after performing an in-place update (MMAP v1)
New Feature SERVER-16873: Need to call commitAndRestart before stashing RUs for getMore
Bug SERVER-15691: acquiring balancer lock may fail and get stuck with concurrent write traffic
Bug SERVER-16738: WiredTiger deadlock opening multiple cursors in parallel
Bug SERVER-16763: mongod terminate due to mongo::DBTryLockTimeoutException during longevity test with wiredTiger
Bug SERVER-16867: Server crashed during iiBench run using WiredTiger engine
Bug SERVER-16908: Performance Regression in Foreground Index Builds with MMAPv1
Bug SERVER-16750: Document never matching query predicate incorrectly returned by query if concurrently updated (WiredTiger)
Bug SERVER-16574: Do not call Explain::getPlanSummary on every insert/update, or eliminate its allocating behavior
Bug SERVER-16882: Enable debug wiredtiger flags in debug mongodb build
Bug SERVER-16807: Update on invalid loc fails in concurrent circumstances
Bug SERVER-15802: Query optimizer should always use equality predicate over unique index when possible
Improvement SERVER-16604: Improve integration with rocks
Bug SERVER-16837: Migrations should time out after 10 hrs waiting for replication
Bug SERVER-16065: Long flush pauses in MMAPv1
Bug SERVER-16922: Slow index build times on secondaries with Wired Tiger
Bug SERVER-16864: ttl_repl_secondary_disabled.js
Bug SERVER-16870: Suppress indexDetails from sharded collstats in shell
Bug SERVER-16907: pause repl6.js between restarts
Bug SERVER-16904: replsets/auth1.js auth error
Bug SERVER-16172: mongod --repair terminates before repair is attempted under WiredTiger
New Feature SERVER-16663: options requested in top-level SConstruct to support non-default libraries and includes
Bug SERVER-16797: Remove support for touch command for WiredTiger
Bug SERVER-15876: Add Collection level lock checks to appropriate entry points to storage engine
Sub-task SERVER-16658: SERVER-14707 C++ driver (server fork) methods getIndexSpecs()/getCollectionInfos() should iterate returned command cursor
Bug SERVER-13863: JS engines shouldn't be linked in to mongos or tools
Bug SERVER-17030: handle WCE in index builds
Bug SERVER-16822: Map reduce doesn't use scoped transaction which results in deadlock at eviction
Bug SERVER-16795: Recovery Unit invariant tripped when calling getMore through DBDirectClient
Bug SERVER-16886: Segmentation fault when loading data into WiredTiger.
Bug SERVER-16930: remove unnecessary fatal assertion when building multiple indexes concurrently via system.indexes writes
Bug SERVER-16749: Unhandled DBException in TTLMonitor terminates server
Bug SERVER-16880: Timer overflows at approximately 9223 seconds
Bug SERVER-16946: "it" not working in the javascript shell when getting next cursor batch
Bug SERVER-16278: Race between shutdown and fsync flush with WiredTiger
Bug SERVER-16970: WiredTiger index prefix compression configuration is not applied to creationString
New Feature SERVER-16957: Permit specification of boost library suffix search preference
Bug SERVER-14707: listCollections and listIndexes commands should return a cursor
Improvement SERVER-16943: Add test for compatibility of replset background index and renameCollection
Improvement SERVER-16708: Adjust Value::compare() to reflect changes to BSON::woCompare()
Bug SERVER-16717: unexpected WriteConflict exceptions with WiredTiger b-tree
Bug SERVER-16664: Segmentation fault on insert operation with Tiger engine / zlib compressor
Sub-task SERVER-16659: SERVER-14707 Cleanup pass for CursorManager/getMore()/listCollections/listIndexes
Bug SERVER-16954: Removing objects from under a geo $near query causes invalid memory access
Improvement SERVER-16887: PlanExecutor::_root should have type scoped_ptr
Bug SERVER-16337: WriteBatchExecutor's WriteConflictException not caught
Task SERVER-16786: oplog can go back in time after rollback/startup, when node clocks are not in sync (mms-qa)
Bug SERVER-16948: printSlaveReplicationInfo() appears broken in master
Bug SERVER-16697: MongoDb terminate when WT fault STATUS_STACK_OVERFLOW
Bug SERVER-16916: RecordId might be inserted more than once with unique index and dupsAllowed == true
Bug SERVER-16913: Return connections to pool on mongos when checking config servers up locally
Bug SERVER-15744: RocksDB storage engine does not pass all tests
Bug SERVER-16961: incrementally cleanup connections in mongos_rs_shard_failure_tolerance.js
Bug SERVER-16865: created checked_cast and use in hot spots
Bug SERVER-16925: Invariant fires during shutdown on secondary node (WiredTiger)
Bug SERVER-16688: DurableImpl::commitAndStopDurThread must wait for the durability thread to exit
Improvement SERVER-16782: Modify collection stats helper to optionally suppress index details
Improvement SERVER-16437: Simple index scans should work like CountScan
Bug SERVER-16994: Handle WriteConflictException when writing oplog on secondaries
Bug SERVER-17005: skip clearing tmp collection if it fails with WriteConflictException
Task SERVER-16878: Increased information to help debug stepdown.js test failure
Bug SERVER-16514: Consistently getting "exception: collection's metadata is undergoing changes" during a drop
Bug SERVER-15322: mongosniff erroneously displays the same string for source and destination IP addresses
Bug SERVER-16773: Performance degradation due to TCMalloc scalability
Bug SERVER-16092: Modifications to admin.system.users and admin.system.roles collections must be serialized
Bug SERVER-16901: upgrade_to_ssl_nossl.js
Improvement SERVER-16982: Optimize WiredTiger index cursor's pointsToSamePlaceAs() implementation
Bug SERVER-16607: Dropping collection during active aggregation operation can crash server
Task SERVER-15614: Implement locking statistics in db.currentOp and db.serverStatus
Bug SERVER-16881: Pause due to sudden 4GB increase in cached bytes under WiredTiger
Bug SERVER-16923: Profiler collection not created when using --profile
Improvement SERVER-17002: Improve AuthenticationFailure log message for mechanism mismatch
Bug SERVER-16672: Disallow NUL bytes in index names
Bug SERVER-17003: Check command status for WriteConflictException on secondaries and retry
Bug SERVER-16919: Oplog can grow much larger than configured size under WiredTiger
Bug SERVER-16655: Geo predicate is unable to use compound 2dsphere index if it is root of $or clause
Improvement SERVER-13256: Remove pch.h
Bug SERVER-16874: Need to reset ElapsedTracker after getMore
Bug SERVER-16676: Compact with WiredTiger does not rebuild indexes
Improvement SERVER-16643: extend existing THP warning to THP defrag setting
Bug SERVER-16461: Setting socket timeouts less than 1.0 seconds leads to setting no socket timeout on Windows
Bug SERVER-16747: KeyString should overflow to heap
Bug SERVER-16902: Possible memory leak in WT b-tree with zlib block compressor
Bug SERVER-16818: Add socket timeout to isSelf replication check
Improvement SERVER-16243: Suppress mmapv1 specific stats from db.serverStatus()
Bug SERVER-16906: storage engines without directoryperdb support should fail to start up with --directoryperdb
Bug SERVER-16639: Server restart with WiredTiger on full disk causes a segfault
Bug SERVER-16863: auth_no_pri.js
Bug SERVER-16793: when running db.getSlaveReplicationInfo() on secondary it treats "self" as "master"
Improvement SERVER-16875: Add disk jstests for directoryperdb with wiredtiger
Bug SERVER-16806: After 1 hour timeout, rangeDeleter incorrectly reports "timed out after 0 seconds"
Bug SERVER-16830: hint by index name breaks with explain()
Task SERVER-16850: Remove support for touch command for RocksDB
Bug SERVER-16601: findAndModify should report that remove and update options conflict
Bug SERVER-16988: db.listCommands has a bug
Improvement SERVER-16811: Only register wiredTiger factory once
Bug SERVER-16754: Confusing severity values when mongo shell start fails
Bug SERVER-16839: collStats command in mongos needs to be updated for new fields
Bug SERVER-16848: Shell's db.collection.totalSize() returns NAN on latest
Improvement SERVER-5399: Add "quit" as a synonym for "exit" in mongo command shell
Bug SERVER-17016: db.collection.createIndex() crashes with dev null storage engine

New in MongoDB 2.8.0 RC 5 (Jan 16, 2015)

Closed issues:
Bug SERVER-16733: mongos does not fail when different configdb string is used
Sub-task SERVER-16657: SERVER-14707 Implement authorization check for getMore/killCursors on cursors owned by global cursor manager
Bug SERVER-16817: --repair fails if there are multiple collections with outdated WT index versions
Bug SERVER-15539: Invariant failure keyOffset >= 0 during 16 thread write command remove operation
Bug SERVER-16775: Steady decline in performance in capped collections under wiredTiger
Bug SERVER-16351: Erroneous document returned in query (wt) (mms-dev)
Improvement SERVER-16632: Change WiredTiger index key format to no longer use BSON
Bug SERVER-16651: Mass deletions and updates (including TTL) completely starve insertions in replica set under WiredTiger
Bug SERVER-16694: Secondary hangs during shutdownServer()
Bug SERVER-16798: KeyString needs to support NUL bytes in Strings
Bug SERVER-3304: Change comparison order so all Dates sort before all Timestamps
Improvement SERVER-16567: extend data directory metadata to hold storage engine creation settings for startup validation
Bug SERVER-16274: secondary fasserts trying to replicate an index
Bug SERVER-14992: Query for Windows 7 File Allocation Fix, and other hotfixes
Task SERVER-16100: Clean up packaging scripts, remove hardcoded version from rpm spec files
Bug SERVER-16760: Coverity analysis defect 49690: Resource leak
Improvement SERVER-16030: Update sizeStorer data when collection validate is called
Bug SERVER-16767: Add cursor metrics to serverStatus in mongos
Bug SERVER-16415: mmapv1 replica multi collection insert is 70% slower vs no replication
Bug SERVER-16734: Remove storage.mmapv1.syncPeriodSecs and storage.wiredTiger.engineConfig.checkpointDelaySecs; use storage.syncPeriodSecs for both.
Bug SERVER-16706: Prevent_logOpRS from pushing primary's last optime back in time in doc-locking storage engines
Bug SERVER-3719: woCompare does not provide a total order over doubles and longs.
Bug SERVER-16660: sharding_system_namespaces.js incorrectly assumes that mongod supports wiredTiger
Bug SERVER-16707: WiredTiger cappedDeleteAsNeeded invariant failure
Bug SERVER-16673: fassert when multi-index build fails with WiredTiger
Bug SERVER-16724: Startup time under WiredTiger is extremely slow and gets worse as database grows
Bug SERVER-16675: getMore looks up doc with invalid RecordId, fails with "Didn't find RecordId in WiredTigerRecordStore"
Improvement SERVER-16742: KEEP_MUTATIONS stage is not needed for storage engines supporting doc-level locking
Sub-task SERVER-12833: SERVER-16100 Implement packaging for RC's and nightlies
Task SERVER-16764: Clean up replication code
Bug SERVER-16568: support "none" as a valid compressor option in WiredTiger
Bug SERVER-16687: MoveFile WiredTiger.turtle.set to WiredTiger.turtle: Broken pipe
Bug SERVER-16794: Invariant failure: WT_NOTFOUND error with concurrent removes and updates
Bug SERVER-16711: Do not create empty database while checking for collections
Bug SERVER-16106: Event Viewer (system) error when pressing power button on machine
Bug SERVER-16635: make sharding/mongos_no_replica_set_refresh.js test agnostic to who is elected primary
Bug SERVER-16753: Wrong component for commands
Bug SERVER-16692: Switching journalling off and on with WT not safe
Improvement SERVER-16602: Review WiredTiger default settings for engine and collections
Bug SERVER-16671: logging write conflicts at log level 0 is too aggressive
Improvement SERVER-16772: Eliminate redundant work in the update path
Improvement SERVER-15259: exitCleanly should not be called in error cases
New Feature SERVER-16744: Targeted community build packages and repo
Bug SERVER-16677: mongod.lock file should be present in data directory regardless of storage engine selected
Bug SERVER-16714: serverStatus command with oplog argument to config server returns error
Bug SERVER-16755: Global severity seems to overwrite component severity in some cases
Bug SERVER-16591: Deadlock due to KVDatabaseCatalogEntry doing blocking transactional operations under the _collectionsLock
Sub-task SERVER-12160: SERVER-16100 Allow packager.py and packager-enterprise.py to use arbitrary gitspecs instead of release tags
Bug SERVER-16615: Long database names will crash server during repair on mmapv1 when using directoryperdb
Bug SERVER-16667: Isolated writes with extreme latencies in replica set under WiredTiger
Bug SERVER-16260: Some commands no longer accept values of the Symbol BSON type
Bug SERVER-7804: compareElementValues for CodeWScope is broken
Improvement SERVER-16061: Remove support for "text" command
Improvement SERVER-16780: Missing auth test of cleanupOrphaned
Bug SERVER-16761: Coverity analysis defect 49668: PW.USELESS_TYPE_QUALIFIER_ON_RETURN_TYPE
Task SERVER-15541: Re-enable yielding
Bug SERVER-16748: consecutive replSetReconfig calls can trigger an invariant failure
Bug SERVER-16600: Windows: net stop service does not do clean shutdown
Bug SERVER-16684: Coverity analysis defect 49093: Unchecked dynamic_cast
Bug SERVER-16614: Windows: should allow users to install 2.6 and 2.8 enterprise versions
Improvement SERVER-16572: Add counter for calls to sched_yield in WiredTiger
Improvement SERVER-16683: Decrease mongos memory footprint when shards have several tags
Improvement SERVER-16580: Remove deprecated system collection references in JS tests
Bug SERVER-16623: Cannot allocate memory (wiredtiger) (mms-dev)
Bug SERVER-16502: CollectionInfoCache being written without exclusive lock
Bug SERVER-16834: Secondary nodes can hang during shutdown if BGSync::_buffer is full
Improvement SERVER-16777: Capped collection truncation behavior across storage engines is inconsistent
Improvement SERVER-16829: Expose tcmalloc runtime configuration options through setParameter mechanism
Task SERVER-16640: Long running queries on the secondary with WT
Bug SERVER-16517: Secondary on 2.8.0rc2 cannot keep up (insert-heavy, mmapv1) (mms-prod-queues)
Improvement SERVER-16483: Display collection name for the "Collection dropped or state deleted during yield of CollectionScan" warning
Bug SERVER-16716: Removing host string arg length limitation for mongo shell
Bug SERVER-16005: Inelegant abend when cannot bind() TCP 27017 at startup
Bug SERVER-16757: Incorrect query report for $explain
Bug SERVER-16649: mongos_rs_auth_shard_failure_tolerance.js should wait for writes to be replicated before shutting down the primary
Bug SERVER-16661: GlobalCursorIdCache leaks a SecureRandom
Bug SERVER-16705: leak in PortMessageServer::acceptMP
Bug SERVER-16740: Log contents instead of pointer address in shardCollection failure
Bug SERVER-16577: 2.8 doesn't have a field to report if query cache plan filters are used in explain
Task SERVER-16695: Move FSM tests into new test suites
Bug SERVER-16720: Init script in Red Hat fails if using YAML inline syntax
Bug SERVER-16723: display active commands in server status only when command metrics are available.
Improvement SERVER-16565: FsyncLock on WT should not imply "snapshotting" is OK
Improvement SERVER-16784: only enable the minimum necessary Scons tools
Bug SERVER-16721: Allow init script PIDFILEPATH to be configured via sysconfig
Bug SERVER-16275: MMAPv1 does not report when capped is false in colstats
Improvement SERVER-16682: remove duplicate sys/socket.h include from mongo/util/net/sock.h
Task SERVER-16778: Remove output to cerr in PlanRankingWorkPlansLongEnough

New in MongoDB 2.6.7 RC 0 (Jan 8, 2015)

New in MongoDB 2.8.0 RC 4 (Dec 27, 2014)

Closed issues:
SERVER-16432: Chunk migration data structures not properly synchronized with storage engines that offer document-level locking
SERVER-16617: Performance regression has been introduced by f59a05c611d66a03c1fb8579b54569bfc2971374
SERVER-16237: Don't check the shard version if the primary server is down
SERVER-16624: Batch insert triggers deadlock-detection fassert
SERVER-16546: Mongod memory grows until killed with wiredTiger repl set with small oplog
SERVER-15798: Helpers::removeRange does not check if node is primary
SERVER-16179: lock manager timeout w/ stack trace
SERVER-16196: Add FSM-based concurrency tests to parallel suite
SERVER-16245: Expose index statistics for WiredTiger
SERVER-16392: ShardInfo should stop using mapped to get size estimate
SERVER-16390: Text stage fetches document twice if phrase or negation filter present
SERVER-16129: cloneCollection does not yield
SERVER-16406: New tests for big polygon
SERVER-16367: Add versioning info to WiredTiger
SERVER-16520: SERVER-14707 Allow creation of ClientCursor objects that are managed by a global registry
SERVER-14306: mongos can cause the in-memory sort limit to be hit on shards by requesting more results than needed
SERVER-16562: Extremely slow shutdown for WiredTiger (non-LSM)
SERVER-16534: SCRAM-SHA-1 auth mechanism should be allowed for __system@local user even if SCRAM-SHA-1 is not configured as an authMechanism
SERVER-16498: d_migrate.cpp should not rely on system.namespaces
SERVER-16633: Add timer to geo near stage to track execution time
SERVER-16457: WT verify and salvage operations failing with EBUSY
SERVER-16111: Store & display catalog creation metadata for WiredTiger collections & indexes
SERVER-16200: Profile and tune mmapv1 performance
SERVER-16523: SERVER-14707 listIndexes should leave a ClientCursor open if multiple batches needed
SERVER-16522: SERVER-14707 listCollections should leave a ClientCursor open if multiple batches needed
SERVER-16606: remove index blockCompressor and collection prefixCompression options
SERVER-16603: Fix rocks build
SERVER-16608: collStats scale argument does not apply to maxSize
SERVER-16081: init.d mongod startup script fails, with dirname message
SERVER-16197: "scons install" broken since tools rewrite
SERVER-16586: mongoperf crashes writing with MMF and syncDelay is other that 0-never
SERVER-16613: indexbg_restart_secondary.js

New in MongoDB 2.6.6 (Dec 10, 2014)

Fixed: Evaluating candidate query plans with concurrent writes on same collection may crash mongod SERVER-15580
Fixed: 2.6 mongod crashes with segfault when added to a 2.8 replica set with 12 or more members SERVER-16107
Fixed: $regex, $in and $sort with index returns too many results SERVER-15696
Change: moveChunk will fail if there is data on the target shard and an required index does not exist. SERVER-12472
Primary should abort if encountered problems writing to the oplog SERVER-12058
Closed issues:
SERVER-16324: Command execution log line displays "query not recording (too large)" instead of abbreviated command object
SERVER-16316: Remove unsupported behavior in shard3.js
SERVER-16291: Cannot set/list/clear index filters on the secondary
SERVER-16283: Can't start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files
SERVER-16107: 2.6 mongod crashes with segfault when added to a 2.8 replica set with >= 12 nodes.
SERVER-16017: Suse11 enterprise packages fail due to unmet dependencies
SERVER-15994: listIndexes and listCollections can be run on secondaries without slaveOk bit
SERVER-15986: Starting with different storage engines in the same dbpath should error/warn
SERVER-15958: The "isMultiKey" value is not correct in the output of aggregation explain plan
SERVER-15899: Querying against path in document containing long array of subdocuments with nested arrays causes stack overflow
SERVER-15849: do not forward replication progress for nodes that are no longer part of a replica set
SERVER-15696: $regex, $in and $sort with index returns too many results
SERVER-15673: Disable SSLv3 ciphers
SERVER-15639: Text queries can return incorrect results and leak memory when multiple predicates given on same text index prefix field
SERVER-15632: MultiHostQueryOp::PendingQueryContext::doBlockingQuery can leak a cursor object
SERVER-15629: GeoParser::parseMulti{Line|Polygon} does not clear objects owned by out parameter
SERVER-15598: Ubuntu 14.04 Enterprise packages depend on unavailable libsnmp15 package
SERVER-15580: Evaluating candidate query plans with concurrent writes on same collection may crash mongod
SERVER-15552: Errors writing to temporary collections during mapReduce command execution should be operation-fatal
SERVER-15528: Distinct queries can scan many index keys without yielding read lock
SERVER-15515: New test for mixed version replSet, 2.4 primary, user updates
SERVER-15500: New test for system.user operations
SERVER-15491: SyncSourceFeedback can crash due to a SocketException in authenticateInternalUser
SERVER-15485: CanonicalQuery::canonicalize can leak a LiteParsedQuery
SERVER-15403: $min and $max equal errors in 2.6 but not in 2.4
SERVER-15318: copydb should not use exhaust flag when used against mongos
SERVER-15233: Cannot run planCacheListQueryShapes on a Secondary
SERVER-14886: Updates against paths composed with array index notation and positional operator fail with error
SERVER-14799: Count with hint doesn't work when hint is a document
SERVER-14763: Update jstests/sharding/split_large_key.js
SERVER-14728: Shard depends on string comparison of replica set connection string
SERVER-14506: special top chunk logic can move max chunk to a shard with incompatible tag
SERVER-14299: For sharded limit=N queries with sort, mongos can request >N results from shard
SERVER-14287: ensureIndex can abort reIndex and lose indexes
SERVER-14249: Add tests for querying oplog via mongodump using --dbpath
SERVER-14184: Unused preprocessor macros from s2 conflict on OS X Yosemite
SERVER-14080: SERVER-8752 Have migration result reported in the changelog correctly
SERVER-14057: Changing TTL expiration time with collMod does not correctly update index definition
SERVER-14015: S2 Compilation on GCC 4.9/Solaris fails
SERVER-13726: indexbg_drop.js
SERVER-13595: Red Hat init.d script error: YAML config file parsing
SERVER-13471: Increase log level of "did reduceInMemory" message in map/reduce
SERVER-12472: Fail MoveChunk if an index is needed on TO shard and data exists
SERVER-12061: Do not silently ignore read errors when syncing a replica set node
SERVER-12058: Primary should abort if encountered problems writing to the oplog
SERVER-10069: Improve errorcodes.py so it captures multiline messages

New in MongoDB 2.8.0 RC 2 (Dec 6, 2014)

Bug SERVER-16279: rollback_too_new.js
Bug SERVER-16291: Cannot set/list/clear index filters on the secondary
Bug SERVER-16315: Replica set nodes should not threaten to veto nodes whose config version is higher than their own
Bug SERVER-15318: copydb should not use exhaust flag when used against mongos
Bug SERVER-16283: Can't start new wiredtiger node with log file or config file in data directory - false detection of old mmapv1 files
Bug SERVER-15986: Starting with different storage engines in the same dbpath should error/warn
Bug SERVER-16289: WiredTiger crashes due to NULL btree handle
Bug SERVER-16354: Memory leak in IndexCatalogEntry::setMultikey
Bug SERVER-16161: log heartbeat failures and cause
Task SERVER-16320: Temporarily disable v28_bad_upgrade_order.js, 2_test_launching_cluster.js
Improvement SERVER-16040: convert any invariantWTOK to wtRCToStatus where possible
Bug SERVER-16252: DBConnectionPool::flush should fully flush connection pool
Bug SERVER-16067: Contention on lockmgr buckets in MMAPv1
Bug SERVER-16333: hot replication mutex
Bug SERVER-15908: DBExplainQuery.addOption does not honor slaveOk
Task SERVER-15957: Get OperationContext for ReplicationCoordinator::signalDrainComplete from the caller
Task SERVER-15875: Remove "new" from newRunQuery, newGetMore, and new_find.{h,cpp}
Bug SERVER-16374: toostale.js assumes master is node 0
Bug SERVER-16306: auth2.js
Bug SERVER-16407: lock_mgr_test reports leaks under the ASAN build
New Feature SERVER-965: Store the indexes of a collection on another partition/drive (for example a SSD) than the documents
Bug SERVER-11066: Authentication failure not honored in replset health poll
Improvement SERVER-15310: kill all operations before attempting stepdown
Bug SERVER-16389: Try to stepdown before shutting down, even when using 'force'
Task SERVER-14143: Reenable JS interruption
Task SERVER-16373: Remove repl_set.h
Bug SERVER-16187: Invariant failure txn->lockState()->isDbLockedForMode(db, MODE_IS)
Bug SERVER-16375: Replication log message about vetoing can be truncated.
Bug SERVER-16332: Fix coverity defect in StorageEngineMetadata::write()
Bug SERVER-16055: Commands with empty string cause the server to terminate
Bug SERVER-16309: Fix rocks_recovery_unit
Bug SERVER-16217: Improve error message returned by replSetReconfig when node addition fails
Bug SERVER-16371: mixed_mode_repl.js, mixed_mode_repl_nossl.js
Bug SERVER-14462: db.currentOp doesn't report locking statistics
Bug SERVER-16376: get_last_error.js fails because it does not expect chaining to occur
Task SERVER-16302: Support "wiredTiger" in createCollection() options
Improvement SERVER-16397: Throttle migration rate in mr_during_migrate.js
Bug SERVER-15804: fix up replica set ramlog
Bug SERVER-16123: WT lsm panic
Bug SERVER-16143: WriteConflict returned to client with concurrent multikey index inserts
Bug SERVER-16328: Journal commits in write lock stat no longer relevant
Bug SERVER-16410: suppress missing-braces warning on clang
Bug SERVER-16184: repeated WriteBackListener error on out-of-order upgrade
Improvement SERVER-16032: Replication should not have multiple active OperationContexts on the same thread
Sub-task SERVER-15826: SERVER-15723 ConvertToCapped appears to be taking a G_X lock
Bug SERVER-16165: multi-update gets stuck retrying after WriteConflict
Improvement SERVER-16132: implement directoryperdb under WiredTiger
Task SERVER-14429: Don't modify ReplSettings object after startup
Bug SERVER-16391: Ensure jstests are agnostic to primary election
Bug SERVER-16294: WiredTiger __wt_meta_track_off crash
Bug SERVER-16259: rocks storage engine needs to support document locking
Improvement SERVER-16362: Defer audit doc creation and redaction until we have to log it
Improvement SERVER-6218: Profile documents should include partial query object instead of "too large" error
Improvement SERVER-16218: delay starting periodic tasks until after index building, at startup
Bug SERVER-15552: Errors writing to temporary collections during mapReduce command execution should be operation-fatal
Bug SERVER-15886: Caching of plan on rooted $or plan tie can lead to poor index choice
Bug SERVER-16256: $all clause with elemMatch uses wider bounds than needed
Bug SERVER-14057: Changing TTL expiration time with collMod does not correctly update index definition
Bug SERVER-16324: Command execution log line displays "query not recording (too large)" instead of abbreviated command object
Bug SERVER-15956: DBExplainQuery.readPref does not work
Improvement SERVER-16137: Validate collection options for all registered storage engines
Improvement SERVER-16233: add support for storage options to createIndex
Sub-task SERVER-14062: SERVER-1241 Remove the global OperationContext registry
Bug SERVER-16400: Trying to remove last voting member from replset gives strange error
Bug SERVER-16114: The touch command does not work with WiredTiger storage engine
Improvement SERVER-15938: Running enablesharding using 2.8 mongods with 2.6 mongos fails with obscure message
Bug SERVER-16160: "memberID" (of serverStatus.repl.slaves) should be "memberId"
Bug SERVER-16255: Enforced SCons minimum is insufficiently high to support TextFile
Improvement SERVER-16304: Shell command startParallelShell should print the process id

New in MongoDB 2.8.0 RC 1 (Nov 25, 2014)

Bug: tailable cursor may miss uncommitted documents
Bug: Deadlock with the WiredTiger storage engine between ListDatabases and DropCollection
Bug: replSetInitiate races with initial sync, resulting in no primary
Bug: WT Performance Regression for update of hot document on 2014-11-10 builds
Bug: Querying against path in document containing long array of subdocuments with nested arrays causes stack overflow
Bug: WriteConflict exception thrown in logOp during update
Bug: mongodump --repair not working under WiredTiger
Bug: After hitting open file limits - WT goes into a loop at shutdown and needs forced kill
Bug: Re-enable rollback_too_new.js with logic that doesn't violate WT oplog assumptions
Task: make maxSyncSourceLagSecs.js resilient against incorrect primary being elected
Bug: Hang during initial sync of 2.8.0-rc0 (wiredtiger)
Bug: Fail initial sync if cloner has index/data errors
Bug: Race in initiate causing no primary to be electable
Bug: Periodic throughput pauses during write load on WT
Bug: MongoD 2.8rc0 terminates with "WiredTigerRecordStore::insertRecord 12: Cannot allocate memory"
Bug: Improve namespace construction in commands
Improvement: invariant, not dassert on all CollectionMetadata reload codepaths
Bug: $explain query against sharded collection with 2.6 shard returns error
Bug: 2.8.0-rc0 shell can't auth to a 2.4 server
Bug: Input validation on the arguments to createCollection
Bug: geo_2d_explain.js is not deterministic
Improvement: createCollection shell helper should take noPadding param and warn on usePowerOf2Sizes
Improvement: Re-enable test from SERVER-10341
Bug: All callbacks invoked by WiredTiger (and other C) storage engines must terminate rather than propagate exceptions
Bug: geo_s2ordering.js depends on server performance
Bug: Rocks storage engine build break
Bug: Missing state change logging for replica set members
Improvement: Increase unit test coverage replica_set_config_checks functions
Bug: Make sure stepDown command can be interrupted with killop
Bug: Stacktrace in logs after creating collection with invalid options
Bug: Invariant failure when running explained update
Bug: tcmalloc issues with OS X 10.10
Task: explain shell helpers should retry using $explain if explain command fails on a mixed version sharded cluster
New Feature: Add configure time checks to enforce compiler minima
Bug: deadlock at shutdown
Bug: Uninitialized value used in SCRAM code
Bug: dropDatabase is slow and returns success immediately though it then blocks progress while running
Bug: Regex query returns incorrect results when index is present
Bug: $in count query with null array does not yield error on empty collection
Bug: misleading "closing cursor" message when retrying stale version
Improvement: consolidate WriteConflictException retry logging logic
Improvement: remove excessive log syncing in WT size storer
Bug: Contention on mutex protecting canAcceptWritesForDatabase access with WT
Bug: Server aborts when querying specific polygon/linestring intersections
Bug: Exponentially back off for write conflict exceptions.
Bug: Logically dead code in CachedPlanStage
Improvement: Add argument to replSetStepDown to allow users to specify how long to wait for secondaries to catch up
Improvement: Add replica set downgrade test.
Sub-task: SERVER-1241 Move audit message up and out of MMAPv1 layer
Bug: Make it possible to get the return code from startParallelShell
Bug: No error message for invalid config in mixed version replset
Bug: ResourceId constructors use operator% where they should use operator& for bit masking
Sub-task: SERVER-15541 Query stages should clear/set their OperationContext pointer in saveState()/restoreState()
Task: Disable getIteratorForRepair in WiredTiger
Bug: do not compare pointer addresses in WT Iterator::restoreState()
Improvement: Remove extra Timer and std::string in AutoGetCollectionForRead
Bug: CanonicalQuery leaks in mr::MapReduceCommand::run(), mr::State::finalReduce(), newRunQuery()
Bug: replSetStepDown without force argument will fail if secondaries are behind and there is any write load
Improvement: Server should not fassert on invalid wiredtiger config options
New Feature: Prevent starting a 2.8 server with 2.4 style users
Bug: WT show performance regression comparing to 10/31 build
Bug: drop queued WT idents on startup
Improvement: Add special WT_CONNECTION::reconfigure command
Improvement: reads often aren't possible while in fsync and lock mode
Improvement: Detect if JSThread threw JS or C++ exception
Sub-task: SERVER-1241 Reenable killall.js after implementing priorities for the shutdown X-lock thread
Bug: replication should stop on inShutdown
Bug: We need to call commitAndRestart on the active recovery unit before releasing our last lock
Sub-task: SERVER-15541 audit re-enabled yielding paths for sharding
Improvement: mongo::profile() shouldn't reuse BufBuilder when profile collection created
Bug: jsCore in small oplog failing during shutdown in ASAN build
Bug: rocks storage engine should deal with nested recovery units correctly
Bug: Add currentOpCtx command to the auth test suite
Task: unit test new majority write behavior in ReplicationCoordinator
Bug: Batched insert command does not yield
Improvement: Use WT bulk loader for foreground index builds
Bug: Segfault in prefetch worker when replicating an insert that creates a database implicitly
Bug: Lock manager should expose methods that separate enqueuing a lock request and waiting for it to be satisfied
Bug: Command parameters not redacted for LOG(2)
Task: Rename heap1 internal classes and filenames to inMemory
Bug: Enable Ulimit warning on Linux
Task: Unify implementation and error code usage of checkForInterrupt and checkForInterruptNoAssert
Improvement: Remove sharding_balance_randomorder1.js
Bug: Do not announce a 'yea' vote when not voting 'yea'
Task: Add storage engine config options to smoke.py and jstests
Bug: clear oplog before starting initial sync
Bug: remove _forceLegacyShardWriteMode from v2.8 mongos
Bug: exiting with SIGINT during WT initialization can fassert
Task: Remove LegacyReplicationCoordinator and rip out dead code
Bug: Shell method DBExplainQuery.count() should return the explain results, not 'this'
Task: Change wiredtiger engine name to wiredTiger for consistency
Bug: The "isMultiKey" value is not correct in the output of aggregation explain plan
Bug: listIndexes and listCollections can be run on secondaries without slaveOk bit
Improvement: Suppress non-applicable profiling data when using WT
Improvement: invariantOK that takes a status
Bug: Updates against paths composed with array index notation and positional operator fail with error
Bug: NamespaceString is inconsistently validating collection names
Improvement: Remove authenticate messages from --quiet logging
Improvement: Expose electionId on primary in isMaster
Improvement: Simplify log component names
Bug: Repeated "[ReplicationExecutor] could not find member to sync from" in healthy replica set
Bug: benchRun should not abort shell when worker threads fail to connect to server
Improvement: mongod --version shouldn't print date, severity, log component
Bug: no space in between collection and name for drop index errmsg
Bug: Windows service: net stop MongoDB gives an error even after stopping the service
Bug: Typo in '__system user/no --keyFile' error message

New in MongoDB 2.6.5 (Oct 9, 2014)

New in MongoDB 2.6.4 (Aug 12, 2014)

New in MongoDB 2.7.4 Dev (Jul 28, 2014)

Bug SERVER-14556: Default dbpath for mongod --configsvr changes in 2.6
Bug SERVER-14311: skipping of index keys is not accounted for in plan ranking by the index scan stage
Bug SERVER-14431: Invalid chunk data after splitting on a key that's too large to index
Bug SERVER-14283: Parameters in installed config file are out of date
Bug SERVER-14538: use-after-free in mongo::profile
Improvement SERVER-14690: no_chaining.js is flakey
Task SERVER-14532: Improve logging in the case of plan ranker ties
Bug SERVER-14494: Dropping collection during active background index build on secondary triggers segfault
Bug SERVER-14505: cannot dropAllIndexes when index builds in progress assertion failure
Bug SERVER-14355: Failed to create capped collection for profiling
Bug SERVER-14212: Mongorestore: using --drop drops Admin users & roles
Bug SERVER-14024: Update fails when query contains part of a DBRef and results in an insert (upsert:true)
Bug SERVER-6687: Valgrind reports "Syscall param write(buf) points to uninitialised byte(s)" on config servers
Improvement SERVER-13648: better stats from migration cleanup
Bug SERVER-12750: mongos shouldn't accept initial query with "exhaust" flag set
Bug SERVER-14625: Query planner can construct incorrect bounds for negations inside $elemMatch
Bug SERVER-14607: hash intersection of fetched and non-fetched data can discard data from a result
Bug SERVER-14123: explain can create a too-large BSONObj
New Feature SERVER-14518: Allow disabling hostname validation for SSL
Bug SERVER-14665: Build failure for v2.6 in closeall.js caused by access violation reading _me
Bug SERVER-14284: jstests should not leave profiler enabled at test run end
Improvement SERVER-9561: Add HOST_ARCH and TARGET_ARCH (and other SCons MS vars) as Variables for MSVC build
Bug SERVER-14476: JSTests::invokeLogError log check is still flawed
Bug SERVER-14641: replication cannot keep up in zbigMapReduce.js
Bug SERVER-14599: Fix error that caused ReplicationExecutor::getWork to busy wait on some platforms
Improvement SERVER-14526: Introduce unittest macros that allow inspecting the exception thrown in ASSERT_THROWS.
Task SERVER-14587: Allow OIDs to be stored in unordered_maps
Improvement SERVER-14586: add toBSON methods to ReplicaSetConfig and MemberConfig classes
Bug SERVER-14522: add fassertFailedWithStatus to errorcodes.py
Improvement SERVER-14436: Implement new types to represent replica set configuration.
Bug SERVER-14581: mongod doesn't compile with cpu-profiler option
New Feature SERVER-14416: extend setParameter to accept BSON object
Improvement SERVER-14653: Allow streaming into ASSERT_TRUE and ASSERT_FALSE unittest macros
Task SERVER-14560: Add cancelHeartbeats
Improvement SERVER-14524: decompose jsobj.cpp
Improvement SERVER-14656: replSetSyncFrom helpers in topology coordinator
Improvement SERVER-14527: MongoDB servers processes should only setLastError when wire writes or write commands fail.
Improvement SERVER-12751: BSONBuilderBase is unused in the codebase
Sub-task SERVER-10448: Allow stats to be gathered directly from the execution stages
Sub-task SERVER-13641: Move killCurrentOp out of threadlocal
Improvement SERVER-14499: remove ReplicationStartSynchronizer
Improvement SERVER-14592: deinline bson-inl.h
Task SERVER-14517: Add doMemberHeartbeat
Task SERVER-14503: move hasDatabases from instance.cpp to heartbeat.cpp
Bug SERVER-14299: For sharded limit=N queries with sort, mongos can request >N results from shard
New Feature SERVER-11118: Add dateToString aggregation operator
Bug SERVER-14502: dereference of canonical query before NULL check in getExecutorIDHack()
Improvement SERVER-14528: Move HostAndPort::me functionality out of HostAndPort type.
Bug SERVER-14671: s2 fails to compile on clang
Improvement SERVER-14613: Refactor HeartbeatInfo and health
Improvement SERVER-14437: Implement new data structures to represent replica set tag information
Bug SERVER-14685: sharding/auth.js test is flaky
Improvement SERVER-14417: migrate QLOG to kQuery LogComponent
Improvement SERVER-14500: remove the replSet bool
Task SERVER-14652: Update tests for localhost exception
Task SERVER-14484: remove the replset portion of dbtest
Bug SERVER-14549: Race condition can cause replSetUpdatePosition command to be sent with information about nodes that the sync source doesn't yet know about
Sub-task SERVER-14624: Implement methods to validate replica set configuration changes
Task SERVER-14316: Remove addUser function from the shell
Improvement SERVER-14533: Break circular dependence in build system among foundation, network and lasterror libraries.
Bug SERVER-9986: Refactor $geoNear searches into new query framework
Bug SERVER-14645: Failure in rollback_cmd_unrollbackable.js
Bug SERVER-5436: IPv6 address ambiguity in HostPort syntax
New Feature SERVER-12512: Add role-based, selective audit logging.
Bug SERVER-14554: DBRef JS constructor does not accept $db with --js-engine=v8-3.25
New Feature SERVER-14415: log component hierarchy
Sub-task SERVER-14407: Get rid of query runners
Task SERVER-14420: Get rid of global replSettings object
Bug SERVER-11107: By default, mongod should not start with an expired or invalid server certificate
Improvement SERVER-6352: Add sh.removeTagRange(ns, min, max, tag)
Improvement SERVER-14041: enhance secondaryThrottle parameter
Task SERVER-14550: Stop maintaining the local.slaves collection
Improvement SERVER-14582: ReplSetTest.waitForIndicator should work with auth on even when primary is down
Sub-task SERVER-14591: Implement getLastErrorDefault inside replcoordinator
Task SERVER-14395: dur::startup() should only be called when using mmapv1 engine
Sub-task SERVER-14458: Add hybrid ReplicationCoordinator to facilitate the transition from the LegacyReplicationCoordinator to the new ReplicationCoordiantorImpl
Task SERVER-14559: Add processNewConfig workflow
Bug SERVER-13764: debug mechanisms report incorrect nscanned / nscannedObjects for updates
Improvement SERVER-14650: Rename ROLE_SOURCE_FIELD_NAME to ROLE_DB_FIELD_NAME
Improvement SERVER-14482: Add ability to append RegEx using BSONArrayBuilder
Improvement SERVER-4282: clean up log messages
Bug SERVER-13177: mongooplog crashes on assertion when it cannot connect to "from" host
Bug SERVER-13730: rs.help() link to REST interface is incorrect
Task SERVER-14536: Helgrind suppressions for race-prone counters.cpp code
Improvement SERVER-5668: Add appendBinData method to BSONArrayBuilder

New in MongoDB 2.7.3 Dev (Jul 4, 2014)

Equality queries on _id with projection on _id may return orphan documents on sharded collections
Equality queries on _id with projection may return no results on sharded collections
stepdown during migration range delete can abort mongod
SEVERE server crash when $centerSphere has non-positive radian
negative opcounter values in serverStatus
do not aggressively pre-fetch data for parallelCollectionScan
SERVER-14135 replSetReconfig and initial config loading through the LegacyReplicationCoordinator
SERVER-14135 Move command processing into the ReplicationCoordinator
SERVER-14135 setLastOptime for slave replication tracking in LegacyReplicationCoordinator
SERVER-14135 awaitReplication in LegacyReplicationCoordinator
SERVER-14135 setLastOptime and awaitReplication in new Replication Coordinator
SERVER-14135 stepdown and shutdown functionality in LegacyReplicationCoordinator
Remove unused files in 2.7 branch
De-inline HostAndPort type, and remove dependencies on networking components.
Move HostAndPort::isSelf to a free function in the repl namespace
mongos does not respect secondary preferred after temporarily unavailable secondary
when a socket between mongos and mongod fails, close all connections immediately
Support for Debian 7 Enterprise .deb packages
Additional tests for setting fields with $ names
struct for ReplicationExecutor work callback parameter
Add StringData() method to BSONElement
Remove hardcoded Visual Studio solution and project files
Do not store native function pointer as a property in function prototype
Fix include-what-you-use fallout from de-inlining hostandport.h
make index_multi.js retry on connection failure
initial_sync3.js occasionally fails by calling insert on a non-primary node
mongorestore has no way to accept input from stdin
SERVER-10448 Explain Command for Explaining Count
clean quota api internally
mongoimport doesn't support $maxKey and $minKey extended JSON
Replace i686 in Linux-32 tarball filename and inner directory name with i386
Deprecate mongoutils namespace
Reenable sasl_authentication_session_test
remove getIndexPrefetchConfig calls from outside the repl namespace
eliminate isCurrentlyAReplSetPrimary
Improve errorcodes.py so it captures multiline messages
SERVER-1241 Prototype Lock Manager for document-level locking
SERVER-10448 Execution Explain for Find
Introduce HostAndPort::parse method
ConnectionString constructor should either work correctly or fail to compile when passed a single string.
avoid attempting to reconfig before node 3 comes back online in reconfig.js
better named logging with tracing
Primary should step down if encountered problems writing to the oplog
Introduce unittest::assertGet(StatusWith) method to facilitate testing functions that return StatusWith
Dead code in IDHackRunner::applyProjection
mongod fails when launched with misconfigured locale
mongoexport generates 'ObjectID', while the shell is using 'ObjectId'
canonicalizeClusterDN may synthesize an invalid iterator
Increase log level of "did reduceInMemory" message in map/reduce
rs.add could detect _id
Upstart configuration fails to start server if other instances are running
mongorestore parseMetadataFile passes non-null terminated string to 'fromjson'
convert HashTable::iterAll() to use boost::bind instead of function callback
Add ability to print/decode top level JSON Array
--use-system-yaml does not detect libyaml-cpp-dev
geoNear should not allow $natural
distinct command should validate input
ShardingTest and authutil js incorrectly handle keyfile authentication
Position of parameters within out {} object shouldn't matter
mongoperf crashes randomly when writing with MMF and record size >4k

New in MongoDB 2.6.3 (Jun 23, 2014)

New in MongoDB 2.6.2 (Jun 18, 2014)

New in MongoDB 2.6.2 RC 1 (Jun 10, 2014)

Fixed:
mapReduce replicates _inc temp collection without _id field
Plans with differing performance can tie during plan ranking
mongod may terminate if x.509 authentication certificate is invalid
Make sure user cache entry is up to date before using it to determine a user's roles in user management commands on mongos
We don't mark V1 users as probed on databases for which they do not have surrogate user documents
IndexBounds::endKeyInclusive not initialized by constructor
Unused snapshot history consuming significant heap space
sync2.js failed
Test suites with options tests fail when run with --nopreallocj
"Whole index scan" query solutions can use incompatible indexes, return incorrect results
Index bounds builder constructs invalid bounds for multiple negations joined by an $or
Cloner needs to detect failure to create collection
noscripting configuration option not available in YAML configuration file
Stack overflow when parsing deeply nested $not query
Insert field validation stops at first Timestamp field
ConvertToCapped on empty collection aborts after invariant() failure
Add new lsb file location for Debian 7.1
tags.js has been flakey due to change in its timeout when it was ported to use write commands
Distinct command on indexed field with geo predicate fails to execute
Unable to install mongodb-org-server 2.6.1-1 on RHEL5 via RPM
Mongodump cannot query oplog.$main or oplog.rs when using --dbpath
mongodb-enterprise is missing needed dependency list
Bounds should not be combined for $or queries that can use merge sort
MongoDB upgrade 2.4 to 2.6 check returns error in internal collections
Solaris builds depend on ILLUMOS libc
Some nested queries trigger an assertion error
CollectionOptions parser should skip "size"/"max" elements if values non-numeric
mongoexport crashes on large timestamps on Windows
Windows file locking related buildbot failures
The built-in roles "restore" doesn't have insert privileges on system.roles collection
Converting v8 internal object to JSON may crash
planSummary truncated at 255 characters
verify assert on empty $in clause and sort on second field in compound index
Catch exception thrown by getShardsForQuery for geo query
Results of $near query on compound multi-key 2dsphere index not sorted by distance
SSL-enabled server appears to not be sending the list of supported certificate issuers to the client
getRunner() returns a bad runner when mixing $or, sort, and NO_BLOCKING_SORT
non-top-level indexable $not triggers query planning bug
Queries containing $or may miss results if multiple clauses use the same index
Shell returns incorrect WriteResult for compatibility-mode upsert with non-OID equality pred on _id field
The "backup" auth role should allow running the "collstats" command
Moving large collection across databases with renameCollection triggers fatal assertion
Excessive freelist scanning for MaxBucket
connections_opened.js failure
setup_multiversion_mongodb.py doesn't download 2.4.10 because of non-numeric version sorting
ndeleted in system.profile documents reports 1 too few documents removed
"type 7" (OID) error when acquiring distributed lock for first time
Shell prints startup warning when auth enabled
Improved:
Need to expose better timing information in currentOps
awaitReplication() sometimes fails to get a config version from master causing test failures
Match x.509 cluster certificates per attribute instead of substring comparison
when 1st config server is non-responsive, some operations wait for network timeout
Add planSummary information to count command
log a message when shouldChangeSyncTarget() believes a node should change sync targets
Typo in error message for "compatibility mode"

New in MongoDB 2.7.1 Dev (May 28, 2014)

Fixed:
mapReduce replicates _inc temp collection without _id field
mongod crashes when re-mapping above user address space of 8TB on Windows
VS 2013 32-bit binaries do not run on Windows XP
Make sure user cache entry is up to date before using it to determine a user's roles in user management commands on mongos
We don't mark V1 users as probed on databases for which they do not have surrogate user documents
IndexBounds::endKeyInclusive not initialized by constructor
The built-in roles "restore" doesn't have insert privileges on system.roles collection
Unused snapshot history consuming significant heap space
Bounds should not be combined for $or queries that can use merge sort
sync2.js failed
Converting v8 internal object to JSON may crash
Test suites with options tests fail when run with --nopreallocj
"Whole index scan" query solutions can use incompatible indexes, return incorrect results
Mongodump cannot query oplog.$main or oplog.rs when using --dbpath
Windows file locking related buildbot failures
Index bounds builder constructs invalid bounds for multiple negations joined by an $or
Insert field validation stops at first Timestamp field
Add new lsb file location for Debian 7.1
Some nested queries trigger an assertion error
Unable to install mongodb-org-server 2.6.1-1 on RHEL5 via RPM
CollectionOptions parser should skip "size"/"max" elements if values non-numeric
Shell returns incorrect WriteResult for compatibility-mode upsert with non-OID equality pred on _id field
Running resync before replset initializes can crash mongod
Coverity analysis defect 15490: Logically dead code
prevent updateUpstream from using a null connection
ExtentManager interface
Leave false config file switches in getCmdLineOpts.parsed
Red Hat init.d script error: YAML config file parsing
Coverity analysis defect 22903: Dereference null return value
Use RAII to prevent memory leaking in shard targeting
Improvement:
awaitReplication() sometimes fails to get a config version from master causing test failures
mongod could warn user if OS transparent huge pages feature is on
Match x.509 cluster certificates per attribute instead of substring comparison
log a message when shouldChangeSyncTarget() believes a node should change sync targets
Provide richer unwind information in logged stack traces on POSIX systems.
Improve user cache invalidation enforcement on mongos
User cache is invalidated too often and too crudely
Javascript code should throw instances of Error instead of strings.
On Windows, windows_basic.h should error if we don't have both NTDDI_VERSION and _WIN32_WINNT
relax merge chunk constraints
enable build on arm64 system
Provide implementation of AtomicWord in terms of std::atomic

New in MongoDB 2.6.1 (May 6, 2014)

New in MongoDB 2.6.1 RC 0 (Apr 23, 2014)

Fixed:
Concurrent GETMORE and KILLCURSORS operations can cause race condition and server crash
Changing replica set configuration can crash running members
Array updates on documents with more than 128 BSON elements may crash mongod
Background index builds from a 2.6.0 primary fail to complete on 2.4.x secondaries
Using the OplogReplay flag with extra predicates can yield incorrect results
Replicated data definition commands will fail on secondaries during background index build
Sensitive credentials in startup options are not redacted and may be exposed
Upgrading from 2.4.x to 2.6.0 via yum clobbers configuration file
Cannot install MongoDB as a service on Windows
mongos does not generate _id for insert documents that are missing it
geoNear returns distance in meters for legacy points in 2.6
replset2.js can swallow assertion failures in test
stepdown_wrt_electable.js makes unsafe use of parallel shells and is unstable as a result
Ignore orphan documents in sharding_migrate_cursor1.js
some query stage constructors touch disk
mr_drop.js is flakey when run in parallel with other tests
Remove data in test array_shard_key.js
rollback5.js can fail due to poor assumptions it makes
Queries using tailable cursors only return one batch if combined with skip()
initial sharding with hashed shard key can result in duplicate split points
geonear command creating too-large BSONObjs
negation of $elemMatch value incorrect in 2.6
$where should not be allowed under $elemMatch
Improve wire API message validation
2.6.0 does not recognize all sort orders provided by a compound index if the index has trailing fields
near queries must ensure legacy points are in bounds
$elemMatch using a compound multikey index can generate an incorrect plan
Creating index with same name but different spec in mixed version replicaset can abort replication
Yield policy for batch-inserts should be the same as for batch-updates/deletes
Large skip and and limit values can cause crash in blocking sort stage
Log rotation can overwrite previous log files
fix geo_borders.js
Wait for deletion after migration in feature2.js
Explode for sort should try reversing index scan direction
Write-error contains incorrect namespace when collection creation fails
Improved:
Addition of debug symbols has doubled compile time
getUser and getRole shell helpers shouldn't throw when user/role not found
Negations over multikey fields do not use the index

New in MongoDB 2.4.10 (Apr 5, 2014)

New in MongoDB 2.6.0 RC 3 (Apr 3, 2014)

New in MongoDB 2.4.10 RC 0 (Mar 27, 2014)

New in MongoDB 2.6.0 RC 2 (Mar 22, 2014)

New in MongoDB 2.6.0 RC 1 (Mar 7, 2014)

New in MongoDB 2.6.0 RC 0 (Feb 22, 2014)

New in MongoDB 2.5.5 Dev (Feb 1, 2014)

New in MongoDB 2.4.9 (Jan 11, 2014)

New in MongoDB 2.4.9 RC 0 (Dec 27, 2013)

New in MongoDB 2.5.4 Dev (Nov 19, 2013)

New in MongoDB 2.4.8 (Nov 2, 2013)

New in MongoDB 2.4.7 (Oct 22, 2013)

New in MongoDB 2.5.3 Dev (Oct 19, 2013)

New in MongoDB 2.4.7 RC 0 (Oct 11, 2013)

New in MongoDB 2.5.2 Dev (Aug 27, 2013)

New in MongoDB 2.4.6 (Aug 21, 2013)

New Features:
Add a global flag to turn off the TTLMonitor thread
Improvements:
Add blockCheckSupported() features to Solaris/SmartOS build
Every write to journal costs additional seek to update file metadata
Display chunk version, not memory address, in non-default log line
Sanity check on "from" side that all cloned and modified documents were sent to TO side on commit
Bug fixes:
Sorting on chunks not applied in differ
Heatbeats can time out due to high network latency while fetching oplog batches. Was: buildbot: zbigMapReduce failing on Linux 64-bit DEBUG
File processinfo_darwin.cpp missing from mongo-cxx-driver
Missing PF_LOCAL symbol in Solaris 10
Solaris file relocation error: posix_fadvise
Missing external symbol strcasestr on Solaris 10
sharding/index1.js failure on V2.4 Linux 64-bit Subscription SUSE 11
buildbot: replset9.js failing on Linux RHEL 32-bit
buildbot-special: smoke JsobjTests::BufBuilderReallocLimit failing on Nightly Linux 64-bit SSL Ubuntu 1204
Shell displays "JavaScript execution failed: " before all JavaScript errors, adds "L" before line number
saslStart returns {ok: 1} instead of {ok:0, code: 2} when unsupported mechanism specified.
Server in replication set fluctuates between states SECONDARY and ROLLBACK if it can't rollback due to too much rollback data
balancer should stop when ConfigServerCheck indicates inconsistency
remapPrivateView: Solaris mmap() is not atomic
Failed SSL connection memory leak
On Solaris, link to backtrace() at run-time or emulate it if not found
js fails when balancer interferes
src/mongo/util/stacktrace.{cpp,h} are missing license headers
Very large documents can cause premature migration commit
Simple client fail with segmentation fault in mongoclient library
Fail if javascript field names have nulls
read_pref_cmd.js failed on multiple v2.4 builders
strcasestr emulation returns invalid pointer
mongo shell crashes with missing host
chaining.js timing out on OS X 10.5 64-bit, Windows 64-bit, Linux 64-bit
replication tests with auth fail on V2.4 Linux 64-bit Subscription SUSE 11
mongod always split at 250000 position
finding start cursor can get starved
remove2.js failed on special V2.4 Linux 64-bit SSL SUSE 11 Build #157
auto2.js failing on Win32 builder
chaining.js failed on Linux 64-bit subscription, "error doing query"
Do not change code pages in Windows version of mongo shell
Add more details on why a shard is 'unavailable' for balancing
Possible bug with SSL handshake

New in MongoDB 2.4.6 RC 1 (Aug 13, 2013)

New in MongoDB 2.4.6 RC 0 (Aug 10, 2013)

New in MongoDB 2.4.5 (Jul 4, 2013)

New in MongoDB 2.4.5 RC0 (Jun 26, 2013)

New in MongoDB 2.4.4 (Jun 5, 2013)

New in MongoDB 2.5.0 Dev (May 23, 2013)

New in MongoDB 2.4.3 (Apr 24, 2013)

New in MongoDB 2.4.3 RC 0 (Apr 20, 2013)

New in MongoDB 2.4.2 (Apr 18, 2013)

New in MongoDB 2.4.2 RC 0 (Apr 12, 2013)

New in MongoDB 2.4.1 (Mar 23, 2013)

New in MongoDB 2.4.0 (Mar 19, 2013)

CHANGES:
Major Features:
Text Search
New Geospatial Indexes with GeoJSON and Improved Spherical Geometry
New Hashed Index and Sharding with a Hashed Shard Key
Hashed Index
Hashed Sharding
Security Improvements:
New Modular Authentication System with Support for Kerberos
Role Based Access Control and New Privilege Documents
Administration Changes:
--setParameter Option Available on the mongos and mongod Command Line
Changes to serverStatus Output Including Additional Metrics
Increased Chunk Migration Write Concern
BSON Document Validation Enabled by Default for mongod and mongorestore
Indexing Changes:
Support for Multiple Concurrent Index Builds
db.killOp() Can Now Kill Foreground Index Builds
Improved Validation of Index Types
Interface Changes:
$setOnInsert – New Update Operator
Limit Number of Elements in an Array
JavaScript Engine Changed to V8
Additional Limitations for Map-Reduce and $where Operations
Improvements to the Aggregation Framework:
$match queries now support the $geoWithin operator for bounded geospatial queries.
The new $geoNear pipeline stage to support geospatial queries.
$min operator only considers non-null and existing field values. If all the values for a field are null or are missing, the operator returns null for the minimum value.
For sort operations where the $sort stage immediately precedes a $limit in the pipeline, the MongoDB can perform a more efficient sort that does not require keeping the entire result set in memory.
The new $millisecond operator returns the millisecond portion of a date.
The new $concat operator concatenates array of strings.
NEW:
Developer Productivity:
Aggregation Framework refinements include an overhaul of the underlying engine introduced in MongoDB 2.2 making it easier to leverage real-time, in-place analytics. MongoDB 2.4 includes significant performance improvements, additional support for binary data, support for $geoWithin and $near geospatial queries, improved string concatenation with the new $concat operator, and improved date calculation semantics.
Geospatial enhancements support new use cases with support for polygon intersection queries (with $geoIntersects), support for GeoJSON, and an improved spherical model. Learn more about geospatial improvements in 2.
Text Search provides a simplified, integrated approach to incorporating search functionality into apps with support for language specific stemming and stop words in 15 languages and real time indexes. Text search is beta for 2.4 and is not recommended for production use. Learn more about text search.
New update semantics for arrays with the $push update operator. Applications can now use $slice to maintain fixed size arrays, and use $sort to maintain sorted arrays. Learn more about capped arrays.
New $setOnInsert update operator supports specifying fields to add only on insert and upsert operations.
Ease of Operations:
Hashed indexes and shard keys provide simple, even distribution for reads and writes. Learn more about hashed indexes and shard keys.
New serverStatus metrics including a working set analysis tool makes capacity planning easier for operations teams. Learn more about the new serverStatus metrics including the working set analyzer.
More control for operators with the ability to terminate indexing operations with automatic resource cleanup.
Improved Performance:
V8 JavaScript engine offers better performance and concurrency with JavaScript based actions including those using the $where query operator as well as mapReduce and eval. Learn more about MongoDB on V8, and JavaScript Changes in MongoDB 2.4.
Improvements to count provide dramatically faster count operations. Counting is now up to 20 times faster for low cardinality index based counts.
Significant optimizations to $elemMatch when using a multi-key index.
More Robust Security:
Role-Based privileges allow organizations to assign more granular security policies for server, database and cluster administration. Learn more about role based access control in MongoDB.
Kerberos authentication mechanism in MongoDB Enterprise.

New in MongoDB 2.4.0 RC 3 (Mar 14, 2013)

New in MongoDB 2.4.0 RC 2 (Mar 7, 2013)

Bug:
[SERVER-5379] - js increment operators (ob.prop += ob2.prop) do not work, after assigment like this ob = ob2
[SERVER-5826] - Creating an index using a non-existing plugin should be an error not a warning
[SERVER-7718] - Timestamp constructor in shell should take seconds instead of milliseconds
[SERVER-8170] - v8 leaks several external objects
[SERVER-8331] - jstests/profile4.js fails on fast machine in Windows 64-bit
[SERVER-8334] - German stop word list contains non-stopwords
[SERVER-8431] - Large update to text index can cause group commit to exceed max size
[SERVER-8493] - jsonString Sign Extends Bindata Type
[SERVER-8574] - acquiring distributed lock for upgrade process for 2.2->2.4 has very long timeout.
[SERVER-8594] - Killing parallel M/R jobs causes temporary collection corruption
[SERVER-8601] - Weird logging behavior when re-attempting 2.2 -> 2.4 upgrade on mongos after first attempt fails
[SERVER-8632] - System.js functions are not available to map/reduce jobs
[SERVER-8648] - checkStatus in DBClientReplicaSet has no explicit socket timeout
[SERVER-8661] - broken doc links in server codebase
[SERVER-8665] - PowerOf2 sizes can allow a document to grow in size inside a Capped Collection
[SERVER-8668] - jstests/sharding/mrShardedOutput.js needs an index
[SERVER-8680] - $setOnInsert should not create an empty parent object when it should be a no op
[SERVER-8685] - mongorestore oplogReplay + oplogLimit should not be compatible with any other collections
[SERVER-8693] - SpiderMonkey shell fails to start -- ReferenceError: JSON is not defined shell/utils.js:574
[SERVER-8696] - no_balance_collection.js failing on RHEL64
[SERVER-8709] - mongo shouldn't be able to connect with revoked cert
[SERVER-8710] - consider additional paranoia for config upgrade
[SERVER-8711] - check result of dynamic_cast not NULL in config_upgrade.cpp
[SERVER-8719] - sock_test makes invalid assumption that network writes are coalesced
[SERVER-8734] - Add non ssl arbiter to ssl RS crashes primary
[SERVER-8751] - Downgrading 2.4=>2.2 without dropping 2dsphere/text indexes can lead to data corruption
[SERVER-8758] - IndexSet fixes
[SERVER-8760] - DBClientReplicaSet::slaveConn returns connection to primary
[SERVER-8761] - auto2.js failing on Windows with auth
[SERVER-8763] - Add decrement to Counter64
[SERVER-8765] - memory leak in config upgrade codepath
[SERVER-8769] - ServerStatus().opcounters.inserts not incremented on mongos
[SERVER-8771] - Mongostat 2.2 can't --discover shards in a 2.4 cluster
[SERVER-8772] - Documents with null value for hashed shard key are not returned via mongos
[SERVER-8780] - ConfigUpgradeTests failing across multiple platforms
[SERVER-8781] - sharding_migrateBigObject.js failing on RHEL
[SERVER-8782] - Solaris segfault in geo_update_btree.js during small_oplog test suite
[SERVER-8786] - Race condition when setting ShardingConnectionHook on mongod connection pools
[SERVER-8787] - mongos crashing when running splits + inserts on collection with hashed shard key
[SERVER-8794] - Couldn't kill the $where operations in features3.js
[SERVER-8802] - readWrite users can delete privilege documents via ensureIndex
[SERVER-8805] - aggregation $within command: exception thrown
[SERVER-8814] - Inserts into any namespace ending in ".system.indexes" are treated like inserts into "system.indexes" and actually build indexes.
[SERVER-8815] - tautological compare in ping time sanity check
[SERVER-8823] - print and printjson should be allowed from $where and MapReduce
[SERVER-8827] - JSTests::TypeConservation unit test segfaults on Spidermonkey
[SERVER-8828] - JSTests::Fundamental unit test fails on Spidermonkey
[SERVER-8832] - Prototype extensions get saved along with primitive data
[SERVER-8849] - read_pref.js failure in RHEL-64bit [2]
Improvement:
[SERVER-8488] - Reintroduce Limited Windows XP Support
[SERVER-8530] - Don't log twice for unauthorized operation
[SERVER-8624] - Remove read-only constraint on Reduce function values
Task:
[SERVER-8393] - Review French stop word list
[SERVER-8394] - Review English stop word list
[SERVER-8395] - Review Italian stop word list
[SERVER-8397] - Review Danish stop word list
[SERVER-8398] - Review Russian stop word list
[SERVER-8399] - Review Spanish stop word list
[SERVER-8400] - Review Swedish stop word list
[SERVER-8401] - Review Turkish stop word list
[SERVER-8402] - Review Romanian stop word list
[SERVER-8403] - Review Hungarian stop word list
[SERVER-8520] - Startup warnings should be suppressed for non-interactive shell sessions
[SERVER-8674] - Update references in codebase to mongodb wiki

New in MongoDB 2.4.0 RC 1 (Feb 26, 2013)

New in MongoDB 2.4.0 RC 0 (Feb 26, 2013)

New in MongoDB 2.4.0 RC0 (Feb 2, 2013)

New in MongoDB 2.2.3 (Feb 2, 2013)

New in MongoDB 2.2.3 RC 1 (Jan 26, 2013)

New in MongoDB 2.2.3 RC 0 (Jan 26, 2013)

New in MongoDB 2.3.2 Dev (Jan 26, 2013)

New in MongoDB 2.2.2 (Jan 26, 2013)

New in MongoDB 2.2.1 (Jan 26, 2013)

New in MongoDB 2.2.1 RC0 (Sep 24, 2012)

New in MongoDB 2.2.0 RC 2 (Aug 24, 2012)

New in MongoDB 2.2.0 RC 1 (Aug 14, 2012)

New in MongoDB 2.1.2 Dev (Jun 27, 2012)

New in MongoDB 2.0.6 (Jun 27, 2012)

Bug:
[SERVER-2917] - Rest / HTTP interface not working with AUTH and command
[SERVER-4603] - when migrating the last chunk off of a shard for a collection, version set to 0 and does *not* block version reset
[SERVER-4609] - StringBuilder signed integer max buffer size spec is too low, can cause allocated memory buffer overflow upon call to BSONObj::toString()
[SERVER-4750] - Secondary syncs to another secondary that has slaveDelay > 0
[SERVER-4758] - OplogReader has no socket timeout
[SERVER-5040] - Cloner can fail to create unique indexes on initial sync
[SERVER-5353] - _id query on capped collection warning can be printed incorrectly
[SERVER-5405] - mongos does not send reads to secondaries after replica restart when using keyFiles
[SERVER-5581] - assertion when clearing the query pattern for an unsatisfiable query (2.0 only, already fixed in 2.1)
[SERVER-5746] - Wrong initialization for ReplicaSetMonitor Nodes
[SERVER-5791] - SConstruct failing to find os.environ['HOME']
Improvement:
[SERVER-3791] - compact always creates a new extent
[SERVER-5303] - yield when fetching a document for migrate
[SERVER-5706] - If only slaveDelay'd nodes are available, use them
cl pt 2.1.2 dev:
Bug:
[SERVER-1470] - Update w/upsert ignores dbref field from query on insert
[SERVER-1877] - Using single hyphen for install parameter will install un-startable Windows service
[SERVER-2291] - count command returns zero in some error cases rather than reporting an error with ok:false
[SERVER-2639] - Inserting into a capped collection an object larger than max size fails silently
[SERVER-2659] - query_yield2 failure
[SERVER-2942] - MapViewOfFileEx failed during large import
[SERVER-3100] - MongoDB often does not shut down cleanly when using init script
[SERVER-3620] - test (dbtests) fails with pthread assertion
[SERVER-3639] - --repair fails if mongodb.lock file exists (and has data) if journaling on (but there are no journal files)
[SERVER-3877] - Solaris 1.8.2 mongo Doesn't Parse Username and Password Options Correctly
[SERVER-3918] - make sparse indexes error out on {$exists: false} queries
[SERVER-4027] - Accept geo points equal to 180 (or specified max)
[SERVER-4138] - Mongo crashes in windows if database name is a reserved file name
[SERVER-4142] - mongod.exe on Windows -- Source files in SCons build but not in Visual Studio project
[SERVER-4262] - when dropping collections need to invalidate all conn sharding state
[SERVER-4372] - Creating a DB with a name containing a colon creates two DBs
[SERVER-4439] - Replica set members shouldn't sync from a node that is very behind
[SERVER-4476] - mongod's cached data should be refreshed on removeShard
[SERVER-4505] - Don't assume old primary is still primary when no nodes are returning isMaster
[SERVER-4581] - Mongos and mongod keep trying to reconnect to removed shard
[SERVER-4726] - Spurious warning: ClientCursor::yield can't unlock b/c of recursive lock during --repair
[SERVER-4732] - potential segfault on full config reload during wbl if collection is dropped / unsharded but still receives writebacks
[SERVER-4758] - OplogReader has no socket timeout
[SERVER-4800] - mongos cursor handling with timeouts
[SERVER-4811] - OID increments can overflow for a given time period
[SERVER-4972] - mongorestore on server with --auth allows restore without credentials of colls with no index
[SERVER-5000] - Connection count is not in sync with the connection thread name
[SERVER-5040] - Cloner can fail to create unique indexes on initial sync
[SERVER-5056] - Server cannot automatically recover if it terminates during recovery
[SERVER-5101] - Test failure in closeall.js
[SERVER-5124] - authentication seems to intermittently fail after adding/removing a shard
[SERVER-5198] - incorrect assumptions in write operations using cursors
[SERVER-5200] - slowNightly tests failing on sharding_balance4.js
[SERVER-5230] - HostAndPort::me() should use bind_ip
[SERVER-5233] - Mongodump stdout not working with authentication
[SERVER-5240] - mongos fails to connect to active cluster with config hosts down
[SERVER-5243] - mongos will route getLastError command to the config server when last insert triggered a split
[SERVER-5258] - RS manager can demote current primary without any log messages or closing connections
[SERVER-5283] - other threads can see partially sharded chunkmanager
[SERVER-5304] - initial sync fails to create index on capped collection
[SERVER-5393] - Killing mongod during a repair can leave it unable to start up
[SERVER-5428] - count8.js failing on Nightly RHEL build
[SERVER-5441] - Mongo shell "getlasterror" does not return "updatedExisting" via mongos
[SERVER-5473] - mongostat throws an error when connecting via a 1.8.x mongos - "unrecognized command: getnonce"
[SERVER-5485] - implement thread safety for shell utils, using fine grained locking
[SERVER-5494] - Changes to benchrun causing failure in bench_test1.js
[SERVER-5511] - Junk strings in listCommand help text?
[SERVER-5536] - 2.0/2.1 sharded mapReduce compatibility
[SERVER-5538] - legacy (2.0) staleconfigexceptions can be thrown w/o namespace, 2.1 needs to handle
[SERVER-5545] - DurableImpl::commitIfNeeded and dur.cpp's _groupCommit are not sufficiently aggressive
[SERVER-5552] - adding an index while an update operation yields can result in incorrect index key entries
[SERVER-5556] - Error 8070 should be an massert not a uassert
[SERVER-5570] - Killing of 'count' query cause incorrect behavior
[SERVER-5597] - Windows implementation of toWideString in text.cpp is incorrect.
[SERVER-5616] - Any shell command containing the string ".auth" is not added to shell history
[SERVER-5624] - mongos does not respect notimeout for cursors
[SERVER-5627] - mongodb hangs when doing mapreduce
[SERVER-5643] - keyfile documentation is incorrect in mongod help
[SERVER-5649] - Initial sync of capped collection does not create _id index
[SERVER-5670] - externally preallocated data files may be ignored when allocating extents
[SERVER-5693] - invalid system_js function will cause mongodb server crash.
[SERVER-5698] - "assert failed : reconfig worked" in fastsync.js
[SERVER-5720] - GridFS::setChunkSize rejects all sizes but 0
[SERVER-5740] - index bounds may be incorrectly determined for $not:$elemMatch queries
[SERVER-5741] - nested $elemMatch queries are not handled in queryutil, trigger "warning: shouldn't get here?" log message
[SERVER-5742] - bigMapReduce.js failing b/c of migrate deletion during m/r
[SERVER-5746] - Wrong initialization for ReplicaSetMonitor Nodes
[SERVER-5748] - mongo/platform folder missing after c++ client driver installation
[SERVER-5750] - assert in server5012.js
[SERVER-5764] - Multi-line mode in the shell went away
[SERVER-5772] - assert in query_yield2.js
[SERVER-5785] - balancer isOverlapping() check is failing
[SERVER-5791] - SConstruct failing to find os.environ['HOME']
[SERVER-5796] - HexData undocumented, crashy
[SERVER-5797] - Uncaught exception in count_slaveok.js
[SERVER-5805] - Fatal Assertion 16213 in fsync.js
[SERVER-5817] - scons error in 32-bit RHEL build
[SERVER-5819] - Use FileAllocator on Windows
[SERVER-5825] - "No module named hashlib" in utils.py
[SERVER-5842] - Exceptions thrown in scripting/engine_spidermonkey.cpp need to be handled there
[SERVER-5844] - mongos cursors return the wrong value for startingFrom
[SERVER-5852] - freebsd 64-bit backtrace segfaults
[SERVER-5856] - make query optimizer code not access data in constructor
[SERVER-5867] - Cannot use SRWLocks on Windows Server 2003
[SERVER-5872] - autosplit would be triggered before data size touch chunksize. The return message "updatedExisting" of update is missed
[SERVER-5876] - user authentication should retry on primary
[SERVER-5883] - duplicate key error in replset7.js
[SERVER-5885] - center query update asserting in geo_full.js
[SERVER-5886] - initial_sync3.js bb failure with "not master"
[SERVER-5891] - TTLMonitor complains with --auth
[SERVER-5895] - auth.js times out waiting for user authentication to replicate
[SERVER-5898] - uncaught exception in mr_shard_version.js
[SERVER-5918] - invalid memory writes in sharding test suite
[SERVER-5920] - bad reload of database config
[SERVER-5924] - Implicit yield reporting in MultiCursor::recoverFromYield() can overstate the yield count if the cursor's current() document is deleted during a yield.
[SERVER-5926] - Segfault when procesing a command with empty namespace
[SERVER-5935] - count8.js sharding_passthrough tests
[SERVER-5936] - assertion (fassert) may be triggered by exact match geo lookup with $or
[SERVER-5940] - error in remove1.js
[SERVER-5941] - Failure in count6.js during sharding_passthrough
[SERVER-5942] - benchRun unable to find all config servers during mr_during_migrate.js
[SERVER-5948] - replSet member can fall out of RECOVERING back into SECONDARY even if no other node in the set can be authenticated against.
[SERVER-5950] - assert in repl13.js
[SERVER-5959] - Mongod crashes with access denied if you spawn multiple shells inserting in quick succession
[SERVER-5962] - "TypeError: result.remaining has no properties" in auth_add_shard.js
[SERVER-5963] - exception cloning object in replset7.js
[SERVER-5968] - geo_update_btree.js never completes, in debug mode only
[SERVER-5970] - QueryOptimizerCursorTests core test failure in Linux debug mode
[SERVER-5971] - replication timeout in replsets_priority1.js
[SERVER-5973] - Aggregation $sort should correctly handle dates before 1970
[SERVER-5986] - fsync deadlock issues
[SERVER-5993] - fsync_lock_read_secondaries.js fails on sharding_passthrough
[SERVER-5995] - capped collection has different hash on master/slave at end of where4.js
[SERVER-5996] - "uncaught exception: map reduce failed" in zbigMapReduce.js
[SERVER-5999] - page fault exception in ClientCursor::aboutToDelete() can leave another Cursor / ClientCursor in an inconsistent state
[SERVER-6001] - key matching is not handled properly for the $elemMatch operator
[SERVER-6003] - Query optimizer failure in core tests on linux 32-bit debug
[SERVER-6006] - moveChunk fails with migration already in progress
[SERVER-6020] - Exception in MongoMutexTest on Windows 32-bit
[SERVER-6021] - Need to make more constructors not access data
[SERVER-6022] - test failure in cursora.js
[SERVER-6031] - read only user can get write priority
[SERVER-6034] - OS X failing to build with "invalid character '%' in mnemonic" on atomic_word_test
[SERVER-6044] - "not enough storage is available" for MapViewOfFileEx
[SERVER-6045] - aggregate cmd crashes server with empty pipeline argument
[SERVER-6053] - query safety with PageFaultException
[SERVER-6061] - Null pointer dereference segfault in mongo shell
[SERVER-6073] - WIndows service installation hits assertion failure in src\mongo\db\client.h(262)
[SERVER-6077] - Build times out compiling queryoptimizertests.cpp on OS X 32-bit
[SERVER-6082] - "process cannot access the file" in remove2.js
[SERVER-6089] - balancer error in mrShardedOutput.js
[SERVER-6090] - uncaught exception in auth_add_shard.js
[SERVER-6091] - Uncaught exception in sync_passive2.js
[SERVER-6092] - chunks not balanced at end of no_balance_collection.js
[SERVER-6094] - sharding/remove2.js has cleanup issues at end of test, fails on Linux but blows up test on Windows
[SERVER-6103] - test failure in counttests.cpp
[SERVER-6114] - Windows compile failing with unresolved external symbols
[SERVER-6116] - buildbot zbigMapReduce.js counts failing in mapreduce
[SERVER-6130] - Replication timeout in moveprimary-replset.js
[SERVER-6132] - a failure inside MakeChunkWritable should call abort/fassert instead of assert
[SERVER-6133] - flushing connection pool can leak connections
[SERVER-6154] - failure in authCommands2
[SERVER-6155] - stale config server in sort1.js
[SERVER-6160] - TypeError in replsets/auth1.js
[SERVER-6164] - connection logging sometimes has no numbers
Improvement:
[SERVER-1506] - when sharding on a and need an index on a,b allow only a,b index
[SERVER-2023] - touch command to pre-heat a collection
[SERVER-2187] - Mongorestore should warn more
[SERVER-2545] - multi data center support via location aware sharding
[SERVER-2939] - Support Unicode fully in the Mongo shell (was "Linenoise UTF8 support")
[SERVER-3062] - Read from the nearest slave
[SERVER-3102] - invalidate querypattern when index becomes multikey
[SERVER-3356] - disk/yield lock - initial query
[SERVER-3636] - not in mem yielding for single doc delete
[SERVER-3735] - Reload settings every pass through the balancer loop
[SERVER-3746] - Support sharding GridFS on {files_id:1, n:1}
[SERVER-4156] - fix read only user support with sharding
[SERVER-4180] - Allow multiple constraints within a $elemMatch clause to be used with a multikey index
[SERVER-4392] - split network thread out from worker thread for secondaries
[SERVER-4407] - Log warnings on startup if (hard) rlimits are no good
[SERVER-4988] - printStackTrace on Windows
[SERVER-4992] - Disable dropDatabase command on "config" if sharded collections exist with data
[SERVER-5046] - per collection option to pad to power of 2
[SERVER-5083] - Include database name in auth log message
[SERVER-5246] - Move linenoise out of third_party
[SERVER-5459] - Add rs.syncFrom() helper
[SERVER-5468] - sslPEMKeyPassword Should not be visible in logs and similar
[SERVER-5475] - use chunk diffs instead of full chunk data reload in mongod and mongos
[SERVER-5492] - Complete serverStatus in FreeBSD
[SERVER-5648] - Improved support for native AtomicUInt64
[SERVER-5658] - Add more debugging info to applyOps code path
[SERVER-5706] - If only slaveDelay'd nodes are available, use them
[SERVER-5784] - Record all btree stats (stop sampling)
[SERVER-5790] - sharding_rs2.js failing during slowNightly tests
[SERVER-5863] - Have mongod --help show default values
[SERVER-5912] - Error message for too-long line in mongoimport is unclear
[SERVER-5934] - rewrite chunk delete
[SERVER-5977] - switch from list.sort() to sort(vector)
[SERVER-6019] - stats for PageFaultException
[SERVER-6023] - add an explicit requireOrder argument to NamespaceDetailsTransient::getCursor()
[SERVER-6039] - make ShardChunkManager not use data in constructor
New Feature:
[SERVER-211] - TTL collections
[SERVER-828] - Support for positional ($) operator in fields to return specifier
[SERVER-2238] - New projection operator $elemMatch
[SERVER-4632] - Display "Welcome to MongoDB" message first time a user runs mongo shell
[SERVER-5458] - --nohttpinterface option on mongos
[SERVER-5685] - Have multiple threads applying oplog ops
[SERVER-5777] - Add support for a range constraint on the first sort field to in/sort/limit optimization
[SERVER-5782] - need a $literal operator to help prevent injection attacks
[SERVER-5861] - Support a richer templating language in benchRun
[SERVER-5903] - pass limit to sharded count
Task:
[SERVER-5902] - check fileMD5 failure for count() problems
Sub-task:
[SERVER-4628] - good lock state reporting with the more granular locking
[SERVER-5794] - mongod should not check minor version on new connections

New in MongoDB 2.0.4 (Mar 20, 2012)

New in MongoDB 1.9.1 (Aug 6, 2011)

Bug:
[SERVER-405] - dates before epoch sorting
[SERVER-958] - Range queries on arrays behave differently with indexes
[SERVER-960] - Dates before epoch not retrieved correctly
[SERVER-984] - Invalid sorting of infinity and -infinity
[SERVER-1648] - When searching with bounding box query, all results are not returned.
[SERVER-1735] - Inconsistent behaviour for $exists: false and $type: 10 in query
[SERVER-1767] - Chunk balancing does not resume after a temporary network outage of a config server
[SERVER-2009] - potentially incorrectly handled test in client cursor may result in improper skipping
[SERVER-2165] - $in and $all don't work together
[SERVER-2253] - db.dropDatabase is not erasing the database entry from the configdb
[SERVER-2302] - if a field has a regular filter and $ors, index breaks in
[SERVER-2371] - Duplicate key error on update does not specify index
[SERVER-2437] - slavedelay logging too verbose with --quiet
[SERVER-2481] - SlaveOK queries shouldn't go to slaves in RECOVERING state
[SERVER-2520] - add comments in code about intentional memory leak in ReplSetImpl::initFromConfig()
[SERVER-2620] - Multi-key indexes on arrays of object with more than one key cause queries to behave like $elemMatch by default.
[SERVER-2626] - Excluding _id field doesn't work with FindAndModify
[SERVER-2634] - mongoimport fails to import CSV when field value is a full stop "."
[SERVER-2710] - Running replSetReconfig while writing to a collection causes secondaries and arbiters to segfault.
[SERVER-2828] - Sharding status not communicated across Routers (mongoS)
[SERVER-2865] - $or clause won't handle 'invalid' key range properly
[SERVER-2879] - Upgrade 1.6 to 1.8 changes shard member format requirements, cryptic error
[SERVER-2881] - Assertion when setting profiling level on a secondary
[SERVER-2882] - operations are still written on primary after it steps down
[SERVER-2884] - Array ordering semantics are different with index than without an index
[SERVER-2904] - bsondump.exe crashes on windows if /? is used as an option
[SERVER-2905] - Scan and order sort should treat missing fields like nulls
[SERVER-2933] - [ReplSetHealthPollTask] Assertion failure false util/message.cpp 512
[SERVER-2935] - shallow woEqual check used for index dup checking
[SERVER-2940] - Double precision errors on linux 32 bit builds
[SERVER-2952] - convert $or parsing masserts to uasserts where necessary
[SERVER-2968] - Exact geo lookups not processed exactly
[SERVER-2972] - Increase the Upstart script kill timeout
[SERVER-3001] - should strip spaces from use db shell helper
[SERVER-3010] - replica set reconfiguration results in NULL _self in ReplSetImpl
[SERVER-3024] - distributed lock will not unlock self
[SERVER-3029] - Master-Slave replication. Slave stopped replicating data.
[SERVER-3031] - Replication fails with "objects in a capped ns cannot grow"
[SERVER-3032] - mongod crashed in ReplSetImpl summarizeStatus
[SERVER-3035] - allow discovery of more than one rs seed
[SERVER-3041] - The 'full' option to validate should imply 'scandata'.
[SERVER-3043] - Assertion failure in mongos: Assertion failure _created client/connpool.h 50
[SERVER-3049] - com.mongodb.MongoException: setShardVersion failed host[mongodb04.example.com:27018] { errmsg: "not master", ok: 0.0 }
[SERVER-3051] - Spherical query assertions should provide useful information in case of long/lat order issues.
[SERVER-3052] - multi update log message adds additions nscanned and fastmod
[SERVER-3054] - Assertion failure bmin