Maven Changelog

What's new in Maven 3.5.4

Aug 29, 2018

Bugs:
MNG-6370 ConcurrencyDependencyGraph#getNumberOfBuilds() does not remove finished projects from unfinished ones
MNG-6372 On Windows Maven can output spurious ANSI escapes such as [0m [0m
MNG-6382 JANSI fails frequently with NumberFormatException when building in parallel
MNG-6386 ${project.baseUri} is not a valid URI (according to RFC 3986)
MNG-6388 Error Fetching Artifacts: “[B cannot be cast to java.lang.String”
MNG-6403 Artifact#VERSION_FILE_PATTERN does not escape period between date and time
MNG-6410 Add groupId to --resume-from suggestion if artifactId is not unique in reactor
Improvements:
MNG-5756 Java home output in mvn -v is misleading
MNG-5940 Change the maven-source-plugin jar goal into jar-no-fork in Maven Super POM
MNG-6362 Add documentation information for GitHub
MNG-6363 Remove secret thread configuration property from code
MNG-6364 Enhanced Jenkinsfile to test Core with JDK 9
MNG-6411 Improve readability of project list returned when --resume-from option value is invalid
Tasks:
MNG-6377 switch from Git-WIP to Gitbox
Dependency upgrades:
MNG-6344 Upgrade Guice to 4.2.0
MNG-6423 Upgrade to Wagon 3.1.0

New in Maven 3.5.2 (Jan 5, 2018)

New in Maven 3.5.0 (Apr 8, 2017)

Overview:
The most obvious change you may encounter is that the console output has colors now MNG-3507, MNG-6093.
The new project.directory special property adds support in every calculated URLs (project, SCM, site) for module directory name that does not match artifactId MNG-5878
The JAVA_HOME discovery has been reduced to simply check if JAVA_HOME is set or not then trying to discover via which java, nothing more MNG-6003.
The build bootstrapping support via Apache Ant has been removed. You can now only bootstrap Maven build with a previous version of Maven, but not with Ant any more MNG-5904.
Based on problems in using M2_HOME related to different Maven versions installed and to simplify things, the usage of M2_HOME has been removed and is not supported any more MNG-5823, MNG-5836, MNG-5607.
Important change for windows users: The usage of %HOME% has been replaced with %USERPROFILE% MNG-6001
Several issues have been reported and fixed related to the mvn script either for Unix/Linux/Cygwin/Solaris or for Windows MNG-5815, MNG-5852, MNG-5963, MNG-6022.
In Maven 3.3.9, we have removed bindings for maven-ejb3-plugin because it does not exist. We follow-up and removed the artifact handler for ejb3 and the par lifecycles MNG-6014, MNG-6017.
In previous Maven versions, there had been a larger problem related to memory usage in case of very large reactors (200-300 modules or more) which caused failures with out of memory exceptions or the need to increase the memory settings. This problem has been fixed with MNG-6030.
If you have defined a property within the .mvn/maven.config file, it was not possible to overwrite the property via command line. This has been fixed with MNG-6078.
Replaced Eclipse Aether with Maven Resolver MNG-6110, MNG-6140.
Using of CI friendly versions via ${revision}, ${sha1} and/or ${changelist} has been fixed MNG-6057, MNG-6090 and MNG-5895. It is very important to know if you are using the previously named properties for a version in your pom you have to use flatten-maven-plugin if you like to do an mvn install or mvn deploy more details can be found at Maven CI Friendly Versions.
Improvements:
The full list of changes as well as detailed descriptions of same can be found in our issue management system.
Bugs:
MNG-5297 - Site should tell ‘prerequisites.maven is deprecated’
MNG-5368 - UnsupportedOperationException thrown when version range is not correct in dependencyManagement definitions
MNG-5629 - ClosedChannelException from DefaultUpdateCheckManager.read
MNG-5815 - “mvn.cmd” does not indicate failure properly when using “&&”
MNG-5823 - mvnDebug doesn’t work with M2_HOME with spaces - missing quotes
MNG-5829 - mvn shell script fails with syntax error on Solaris 10
MNG-5836 - logging config is overridden by $M2_HOME/lib/ext/*.jar
MNG-5852 - mvn shell script invokes /bin/sh but requires Bash functions
MNG-5895 - Problem with CI friendly usage of `${..}`` which is already defined via property in pom file.
MNG-5958 - java.lang.String cannot be cast to org.apache.maven.lifecycle.mapping.LifecyclePhase
MNG-5961 - Maven possibly not aware of log4j2
MNG-5962 - mvn.cmd fails when the current directory has spaces in between
MNG-5963 - mvn.cmd does not return ERROR_CODE
MNG-6022 - mvn.cmd fails if directory contains an ampersand (&)
MNG-6053 - Unsafe System Properties copy in MavenRepositorySystemUtils, causing NPEs
MNG-6057 - Problem with CI friendly usage of `${..} reactor order is changed
MNG-6090 - CI friendly properties break submodule builds
MNG-6105 - properties.internal.SystemProperties.addSystemProperties() is not really thread-safe
MNG-6109 - PluginDescriptor doesn’t read since value of parameter
MNG-6117 - ${session.parallel} not correctly set
MNG-6144 - DefaultWagonManagerTest#testGetMissingJarForced() passed incorrect value
MNG-6166 - mvn dependency:go-offline fails due to missing transitive dependency jdom:jdom:jar:1.1
MNG-6168 - Fix unclosed streams
MNG-6170 - NPE in cases using Multithreaded -T X versions:set -DnewVersion=1.0-SNAPSHOT
MNG-6171 - REGRESSION: WARNING about usage of a non threadsafe marked plugin is not showed anymore
MNG-6172 - Precedence of command-line system property options has changed
MNG-6173 - MavenSession.getAllProjects() should return all projects in the reactor
MNG-6176 - Javadoc errors prevent release with Java 8
MNG-6177 - The --file command line option of the Windows and Unix launchers does not work for directory names like “Spaces & Special Char”
MNG-6180 - groupId has plain color when goal fails
MNG-6181 - HttpClient produces a lot of noise at debug loglevel
MNG-6183 - Dependency management debug message corrections.
MNG-6190 - maven-resolver-provider’s DefaultArtifactDescriptorReader has mismatched constructor and initService methods
MNG-6191 - mvn -f complains about illegal readlink option under macOS
MNG-6192 - distribution zip file has unordered entries
MNG-6195 - Use consistent quoting forms in mvn launcher script
MNG-6198 - mvn script fails to locate .mvn directory when pom.xml location specified with -f
Dependency upgrade:
MNG-5967 - Dependency updates
MNG-6110 - Upgrade Aether to Maven Resolver
Improvements:
MNG-5579 - Unify error output/check logic from shell and batch scripts
MNG-5607 - Don’t use M2_HOME in mvn shell/command scripts anymore
MNG-5883 - Silence unnecessary legacy local repository warning
MNG-5889 - .mvn directory should be picked when using --file
MNG-5904 - Remove the whole Ant build
MNG-5931 - Fixing documentation
MNG-5934 - String handling issues identified by PMD
MNG-5946 - Fix links etc. in README.txt which is part of the delivery
MNG-5968 - Default plugin version updates
MNG-5975 - Use Java 7’s SimpleDateFormat in CLIReportingUtils#formatTimestamp
MNG-5977 - Improve output readability of our MavenTransferListener implementations
MNG-5993 - Confusing error message in case of missing/empty artifactId and version in pluginManagement
MNG-6001 - Replace %HOME% with %USERPROFILE% in mvn.cmd
MNG-6003 - Drastically reduce JAVA_HOME discovery code
MNG-6014 - Removing ArtifactHandler for ejb3 lifecycle
MNG-6017 - Removing ArtifactHandler for par lifecycle
MNG-6030 - ReactorModelCache not used effectively after maven version 3.0.5 which cause a large memory footprint
MNG-6032 - WARNING during build based on absolute path in assembly-descriptor.
MNG-6068 - Document default scope compile in pom XSD and reference documentation
MNG-6078 - Can’t overwrite properties which have been defined in .mvn/maven.config
MNG-6081 - Log refactoring - Method Invocation Replaced By Variable
MNG-6102 - Introduce ${maven.conf} in m2.conf
MNG-6115 - Add Jansi native library search path to our start scripts to avoid extraction to temp file on each run
MNG-6145 - Remove non-existent m2 include in component.xml
MNG-6146 - Several small stylistic and spelling improvements to code and documentation
MNG-6147 - `MetadataResolutionResult#getGraph()`` contains duplicate if clause
MNG-6150 - Javadoc improvements for 3.5.0
MNG-6163 - Introduce CLASSWORLDS_JAR in shell startup scripts
MNG-6165 - Deprecate and replace incorrectly spelled public API
MNG-6179 - Remove unused prerequisites
MNG-6185 - Replace doclettag explanation with annotations in AbstractMojo javadoc
MNG-6189 - WARN if maven-site-plugin configuration contains reportPlugins element
New Features:
MNG-3507 - ANSI color logging for improved output visibility
MNG-5878 - add support for module name != artifactId in every calculated URLs (project, SCM, site): special project.directory property
MNG-6093 - create a slf4j-simple provider extension that supports level color rendering
MNG-6182 - ModelResolver interface enhancement: addition of resolveModel(Dependency) supporting version ranges
Tasks:
MNG-5954 - Remove outdated maven-embedder/src/main/resources/META-INF/MANIFEST.MF
MNG-6106 - Remove maven.home default value setter from m2.conf
MNG-6136 - Upgrade Maven Wagon from 2.10 to 2.12
MNG-6137 - Clean up duplicate dependencies caused by incomplete Wagon HTTP Provider exclusions
MNG-6138 - Remove obsolete message_*.properties from maven-core
MNG-6140 - update documentation’s dependency graph with resolver + resolver-provider + slf4j-provider
MNG-6151 - Force Push master from 737de43e392fc15a0ce366db98d70aa18b3f6c03
MNG-6152 - Add a Jenkinsfile so that builds.apache.org can use multibranch pipeline
Wishes:
MNG-2199 - Support version ranges in parent elements
MNG-6088 - after forked execution success, add an empty line
MNG-6092 - warn if prerequisites.maven is used for non-plugin projects

New in Maven 3.3.9 (Nov 21, 2015)

IMPROVEMENTS:
The par lifecycle has been removed from the default life cycle bindings and the maven-ejb3-plugin has been removed from default bindings, cause it does not exist MNG-5892, MNG-5894.
The default bindings defined two different versions for the maven-resources-plugin which has been fixed by MNG-5893.
Switch to official Guice 4.0, upgrade to Eclipse/Sisu 0.3.2 has been done with MNG-5923 and MNG-5924.
Several areas of Maven Core have been changed to use Commons Lang’s Validate to intercept invalid input MNG-5649.
Upgrade Java minimum version prerequisite from Java 6 to Java 7 MNG-5780.
Custom packaging types: configuring DefaultLifecycleMapping mojo executions MNG-5805.
Disallow the programmatic injection of project dependencies MNG-5818.
Close IO streams in finally or try-with-resource statement MNG-5844.
Make url inheritance algorithm more visible MNG-5871.
Update used Modello version from 1.8.1 to 1.8.3 MNG-5888.
Maven build does not work with Maven 2.2.1 MNG-5905.
Use canonical name for UTC timezone MNG-5906.
Upgrade maven-parent to version 27 MNG-5911.
Upgrade Wagon version to 2.10 MNG-5915.
Upgraded to plexus-component-* 1.6 that uses asm 5.x MNG-5921.
Upgrade plexus-utils to 3.0.22 to support combine.id as configuration attribute for Map merging MNG-5922.
Update animal-sniffer-maven-plugin to 1.14. MANIMALSNIFFER-49 required when building with JDK9 MNG-5925.
BUGS:
Moving from Maven 3.0.5 to 3.3.3 breaks plugins with some dependencies on the classpath. This has been fixed with MNG-5787.
The Cygwin Shell related handling of the MAVEN_PROJECTBASEDIR has been fixed with MNG-5812.
The scripts to call Maven has introduced a bug related to the handling of the MAVEN_OPTS and debugging options which has been fixed by MNG-5813.
Since Maven 3.3.1 it is possible to have configurations stored on a per project base in the ${maven.projectBasedir}/.mvn folder of the project. There you can use the maven.config file to store command line options instead of repeating them every time you call Maven. In cases where this file has been empty Maven ended with a failure. This has been fixed with MNG-5816.
The handling of the relativePath in a parent has been fixed related to the case that the parent has the same groupId:artifactId but a different version. In this case the resolution must be done against the repository. This has been fixed by MNG-5840.
In cases where you start Maven in the root of a windows drive Maven will fail. This has been fixed by MNG-5796.
The elements is intended for buildtime checking but not for runtime checks which should be left to maven-enforcer-plugin. This has not been documented accordingly. This has been done with MNG-5297.
In situations like this: mvn -Dtest=\"anton\" clean package the trailing quote is stripped away which could cause problems. This has been fixed with MNG-5681.
Possible NullPointerException in org.apache.maven.repository.MetadataResolutionResult has been fixed with MNG-5721.
There had been several issues with the mvn script which are for example wrong locating the .mvn folder, nonportable shell constructs, wrongly setting ‘maven.multiModuleProjectDirectory’ variable or directories which contain spaces. Those issues have been fixed MNG-5786, MNG-5858, MNG-5882 and MNG-5884.
Broken link of ‘Building Maven’ in README.md has been fixed by MNG-5886.
maven-aether-provider/maven-compat does not always generate snapshot versions using Gregorian calendar year fixed in MNG-5877
Log file command line option description contains an extra word has been fixed by MNG-5891
org.apache.maven.repository.internal.RemoteSnapshotMetadataTest fails to start at midnight fixed with MNG-5907.
Multi-module build with ear fails to resolve war in 3.3.3 fixed in MNG-5898.
TASK:
Update Modello site url MNG-5887.

New in Maven 3.3.1 (Mar 23, 2015)

Bug:
[MNG-5686] - mvn cannot execute /usr/libexec/java_home/bin/java on OS X.
[MNG-5688] - mvn script is not compatible with OSX (Darwin) - PATCH ATTACHED
[MNG-5702] - Wrong reactor summary output while using -T option
[MNG-5742] - inconsistent classloading for extensions=true plugins
[MNG-5745] - Add example of toolchains.xml to Maven distribution
[MNG-5747] - DefaultMavenExecutionRequest.copy() doesn't keep useLegacyLocalRepository
[MNG-5748] - DefaultMavenExecutionRequest.copy() doesn't keep builderId
[MNG-5762] - execution request populate ignores plugin repositories
[MNG-5766] - LifecycleModuleBuilder effectively swallows runtime exceptions and errors
[MNG-5779] - NoClassDefFoundError: org/slf4j/spi/LocationAwareLogger when generating javadoc during site reporting
[MNG-5783] - cobertura-maven-plugin:instrument failing NoClassDefFoundError: org/slf4j/LoggerFactory
Improvement:
[MNG-1958] - we need a var that always points to the root directory in multi module builds
[MNG-3891] - Modify maven-toolchain to look in ${maven.home}/conf/toolchains.xml and in ${user.home}/.m2/toolchains.xml
[MNG-5734] - Empty module entry should fail instead of just producing a WARNING
[MNG-5752] - avoid hardcoded system classloader references
[MNG-5754] - Toolchains should be read during initialization
[MNG-5767] - project-specific default jvm options and command line parameters
[MNG-5768] - specify execution-id for direct plugin goal invocation from command line
[MNG-5771] - improved user-configurable core extensions mechanism
[MNG-5772] - upgrade to sisu 0.3.0 and sisu guice 3.2.5
New Feature:
[MNG-5740] - Add module maven-builder-support
[MNG-5753] - Allow plugin implementors to choose how they want the configuration created for a particular MojoExecution
[MNG-5755] - Access toolchains without maven-toolchain-plugin
[MNG-5774] - Provide an extension point to provide alternate CLI configuration mechanism
Task:
[MNG-5757] - update aether to 1.0.2
[MNG-5776] - Drop support for Win9x in mvn launch scripts
[MNG-5778] - switch from 3.2.x to 3.3.x
[MNG-5780] - upgrade Java minimum version prerequisite from Java 6 to Java 7

New in Maven 3.2.5 (Dec 20, 2014)

New in Maven 3.2.3 (Aug 26, 2014)

New in Maven 3.2.1 (Feb 24, 2014)

Highlights:
Transitive dependency excludes
Reactor changes
AbstractMavenLifecycleParticipant changes
New Builder interface
Continuous delivery friendly versions
Custom lifecycle mapping
Bug:
[MNG-5075] - MavenProject.getParent throws undocumented ISE
[MNG-5389] - AbstractMavenLifecycleParticipant need a afterSessionEnd
[MNG-5467] - intermittent "ProtocolException: The server failed to respond with a valid HTTP response"
[MNG-5479] - ExecutionEvent.Type.SessionEnded omited when runtime exception thrown
[MNG-5494] - Add a license file that corresponds to each GAV in the distribution
[MNG-5528] - Help text confuses people
[MNG-5550] - MojoExecution source is never set to LIFECYCLE
[MNG-5553] - ${map(some.key)} is not properly interpolated
[MNG-5557] - Limit the reactor to the projects that are specified using --projects
[MNG-5559] - upgrade to last wagon 2.6
[MNG-5572] - Warn for building plugins with extensions in a reactor
Improvement:
[MNG-3526] - Small change to artifact version parsing.
[MNG-4099] - Password encryption CLI switches should prompt for password if missing
[MNG-5176] - Print build times in an ISO 8601-style manner
[MNG-5406] - don't expose core's slf4j-api by default, add a plugin-descriptor option to expose
[MNG-5530] - mojo execution guice scope
[MNG-5549] - Provide before/after callbacks for project and mojo execution
[MNG-5574] - Write error/warning messages from mvn shell and batch scripts to stderr
[MNG-5575] - Separate build strategies into their own implementations
[MNG-5576] - Allow continuous delivery friendly versions
[MNG-5578] - Make the ReactorReader pluggable in the core
[MNG-5581] - Provide a way to customize lifecycle mapping logic
[MNG-5582] - Continue to track all the projects in the reactor even if the set is constrained by --projects
New Feature:
[MNG-2315] - Add option to exclude all transitive dependencies for a particular one
[MNG-3832] - Allow wildcards in dependency exclusions
[MNG-5230] - Command line option to exclude modules from reactor

New in Maven 3.1.1 (Oct 5, 2013)

New in Maven 3.1.0 (Jul 15, 2013)

Bug:
[MNG-3131] - Error message is misleading if a missing plugin parameter is of a type like List
[MNG-5016] - A mirror's layout setting should default to 'default' since thats' the only layout supported lay in maven 3
[MNG-5206] - plexus container never disposed
[MNG-5208] - Parallel (-T option) multi module build fires wrong "project failed event"
[MNG-5209] - MavenProject.getTestClasspathElements can return null elements
[MNG-5212] - DefaultPluginDescriptorCache does not retain pluginDescriptor dependencies
[MNG-5214] - Dependency resolution substitutes g:a:v:jar for j:a:v:something-else when something-else isn't in the reactor
[MNG-5233] - ArtifactMetadataRetrievalException from org.apache.maven.artifact.metadata is not anymore binary compatible.
[MNG-5258] - localRepository in settings.xml does not handle ~ as home.dir
[MNG-5261] - upgrade wagon version to 2.3 to fix issues with redirect
[MNG-5270] - README.bootstrap.txt says "Ant 1.6.5 or later" BUT 1.8 or later is needed
[MNG-5280] - Inconsistent order of repositories and pluginRepositories from profiles in settings (regression Maven 3)
[MNG-5289] - -Dmaven.repo.local not honored
[MNG-5312] - MavenProject.getParent intolerably slow when import scope used heavily
[MNG-5313] - Unnecessary DefaultModelBuilder.build overload
[MNG-5314] - DefaultModelValidator misuses String.matches
[MNG-5336] - Descriptor Reference for settings.xml is incorrect
[MNG-5387] - Add ability to replace an artifact in mid-build
[MNG-5390] - mvn -rf (no argument) results in NPE
[MNG-5395] - logger name for plugins should not be DefaultMavenPluginManager
[MNG-5396] - logger name for execution events should not be MavenCli
[MNG-5398] - scriptSourceDirectory in superpom is not prefixed with /usr/home/cmsslave/slave15/maven-site-staging/build/trunk/
[MNG-5403] - tar.gz release artifacts have wrong permissions on directories
[MNG-5418] - Can't activate a profile by checking for the presence of a file in $myProperty
[MNG-5430] - use wagon 2.4
[MNG-5444] - ModelSource API is not sufficient to resolve project hierachies
[MNG-5445] - Missing PathTranslator @Requirement in org.apache.maven.project.interpolation.StringSearchModelInterpolator
[MNG-5456] - Maven skips modules and reports success if parallel build encounters java.lang.Error
[MNG-5477] - "malformed POM" warning issued when no version in reporting section
Improvement:
[MNG-4505] - use slf4j to control various logging frameworks
[MNG-5181] - New resolution from local repository is very confusing
[MNG-5239] - Maven integration developers would like to be able to override the maven logging appender.
[MNG-5245] - upgrade default plugins versions
[MNG-5338] - Accept a directory with -f/--file
[MNG-5350] - improve @threadSafe error message: tell which goal
[MNG-5399] - Upgrade version of maven-release-plugin in superpom to 2.3.2
[MNG-5400] - Upgrade version of maven-dependency-plugin in superpom to 2.5
[MNG-5402] - Better build number for git
[MNG-5480] - document in POM descriptor reference how urls are interpolated from parent
[MNG-5482] - Catch NoClassDefFoundError org/sonatype/aether
New Feature:
[MNG-519] - Timestamps on messages
[MNG-5306] - for IDE embedding have ways of collecting model problems without failing the process
[MNG-5343] - Allow the use of JSR330 annotation in Maven extensions and plugins
[MNG-5344] - Allow the SLF4J loggers to be @Injected
[MNG-5354] - Integrate Eclipse Aether 0.9.0.M2
[MNG-5380] - Cannot preserve whitespace in Maven plugin configuration
[MNG-5381] - Restore MavenSession.getRepositoryCache()
[MNG-5382] - Add an IT for @Inject used in plugins
[MNG-5386] - Dispose of ClassRealms after invocation to prevent out of Permgen errors
[MNG-5388] - Restore embedded integration tests
[MNG-5391] - Update the default WAR plugin version to avoid version 2.3
[MNG-5393] - Look at Sonar's use of SLF4J and Logback
[MNG-5397] - Use SLF4J for logging
[MNG-5407] - Change MavenITmng1830ShowVersionTest to account for SHA1 as version
Task:
[MNG-5279] - add CLI options to documentation
[MNG-5365] - Replace Aether's deprecated ConfigurationProperties with ConfigUtils
[MNG-5372] - remove classes that were added during Maven 3 alpha and beta but were deprecated before 3.0 final release
[MNG-5373] - Document the usage and benefits of JSR330
[MNG-5374] - Fix transfer listener after the JSR330 merge
[MNG-5375] - Document use of SLF4J
[MNG-5376] - Account for changes between the Apple and Oracle JDKs on OSX
[MNG-5453] - Update Maven 3 build to use Eclipse/Sisu
Wish:
[MNG-5370] - separate artifact-handlers configuration from plugin bindings to default lifecycle
[MNG-5461] - rename _maven.repositories tracking file to _remote.repositories

New in Maven 3.0.5 (Feb 25, 2013)

New in Maven 3.0.4 (Nov 19, 2012)

Bug:
[MNG-4792] - Preemptive authentication doesn't work
[MNG-5064] - mvn -nsu (--no-snapshot-updates) should not download snapshots (and break local builds)
[MNG-5096] - exclusion on dependency with typetest-jar/type doesn't work in maven 3
[MNG-5113] - NullPointerException on javadoc site generation
[MNG-5131] - Wrong encoding for encrypted passwords
[MNG-5135] - Regression: in some cases aggregator mojo is unable to resolve dependencies with custom packaging
[MNG-5137] - Reactor resolution does not work for forked multi module builds
[MNG-5149] - DefaultArtifactRepositoryFactory.createArtifactRepository overload w/ layoutId passes wrong (repo) id
[MNG-5153] - ModelMerger omits relativ path
[MNG-5155] - 'inherited' flag of report sets ignored.
[MNG-5157] - NPE stemming from DefaultModelBuilder.containsCoordinates
[MNG-5163] - MavenProject.getPluginRepositories misimplemented
[MNG-5164] - Odd name of central in superpom
[MNG-5165] - Problem with scp transport (wagon-maven-plugin 1.0-beta-3, Maven 2.2.1, Ubuntu 11.04)
[MNG-5192] - prevent ConcurrentModificationException in parallel mode -Tx when project have errors
[MNG-5221] - Default version of m-site-p does not work (no reports)
[MNG-5225] - The default version of the maven-site-plugin as defined in the site-lifecycle must be 3.x
[MNG-5224] - REGRESSION: Injected Settings in a Mojo are missing the profiles from settings.xml
Improvement:
[MNG-4112] - Set property containing the currently executing maven version.
[MNG-5073] - ProjectBuilder.build(File,ProjectBuildingRequest) returns null project if dependency version info is missing
[MNG-5076] - Improve SEO of documentation of lifecycle.xml
[MNG-5119] - improve site organization of core components
[MNG-5134] - Standard documentation for build-in properties
[MNG-5141] - Make MojoExecutor.ensureDependenciesAreResolved public
[MNG-5151] - use CNAME or repo to provide more stability
[MNG-5152] - upgrade wagon to the final 1.0 version
[MNG-5158] - Make loading of extensions from lib/ext more robust with regard to existence of ext directory
[MNG-5159] - Extend validation of settings.xml to check for uniqueness of id elements
[MNG-5175] - replace wagon http lightweight with wagon http 2.1
[MNG-5200] - upgrade plugin versions in super pom
[MNG-5201] - upgrade aether to 1.13 and sisu to 2.3.0
Task:
[MNG-5046] - Remove $Id$ from sources
Test:
[MNG-5114] - Handling unrecognized version qualifiers
Wish:
[MNG-5118] - add aggregated javadoc

New in Maven 2.2.1 (Sep 15, 2009)

New in Maven 2.0.9 (Nov 5, 2008)

MNG-3395 - Starting in 2.0.9, we have provided defaults in the super pom for the plugins bound by default to the lifecycle and a few other often used plugins. This will introduce a bit of stability to your builds because core plugins will not change magically on you when they are released. We still recommend taking control of your plugin versions via pluginManagement declarations as this is the most robust way to future proof your builds. Defaulting the plugins in the superpom was a step towards introducing stability for small builds and new users. A full table of the versions used is shown in the next section.
MNG-1412 / MNG-3111 introduced deterministic ordering of dependencies on the classpath. In the past, natural set ordering was used and this lead to odd results. The ordering is now preserved from your pom, with dependencies added by inheritence added last. In builds that had conflicting or duplicate dependencies, this may introduce a change to the output. In short, if you have weird issues with 2.0.9, take a look at the dependencies to see if you have conflicts somewhere.
MNG-2234 - In the past, settings.xml was ignored if there was no pom present (like in archetype:generate). Now all settings will be interpreted correctly.
MNG-2664 - The webdav wagon is now included in the core bundle by default. This means deploying 3rd party jars without a pom is a bit easier. The version of the wagon may still be overriden with an extension declaration within your pom.
MNG-2972 The plugin.dependency section can now override the dependencies specified by a plugin itself. This is useful for example to upgrade the version of checkstyle used by the checkstyle plugin (and many more).
MNG-3286 - The inherited field in a plugin execution block is now functioning correctly. Previously you could only dis-inherit an entire plugin configuration.
MNG-3220 - There is now a new scope for importing managed dependencies. See here and here for details. Please note that the use of this scope will break backwards compatibility with older Maven versions. If you use this, you should use the maven-enforcer-plugin to require a minimum maven version of 2.0.9
MNG-3394 - plugin versions specified in pluginManagement are now properly overriden by build.plugin.version specification.
MNG-3415 - Transmission errors when downloading artifacts should not corrupt the local repository metadata. Hopefully this means the end of "delete your local repo" as a debug step.
MNG-3461 - There is a new, more flexible way to define mirror settings. See the settings specification for more information.