The Apache Maven team is pleased to announce the release of the Apache
Maven 3.6.2.

Apache Maven is a software project management and comprehension tool. Based
on the concept of a project object model (POM), Maven can manage a
project’s build, reporting and documentation from a central piece of
information.

You can find out more about Apache Maven at https://maven.apache.org

You can download the appropriate sources etc. from
the download page

We really value the contributions of these non committers, so this section is
focused on those individuals. Descriptions of the issues fixed can be found at
the end of these release notes.

Issue Reporters of this release:

Benoit GUERIN
Christian Schulte
Elliotte Rusty Harold
Falko Modler
Francesco Chicchiriccò
Guillaume Nodet,
guofei
Joseph Walton
Louis Mills
Mark Derricutt,
Mark McKelvy
Mickael Istria
Nicolas Echegut
Nicolas Radde
Raphael Rösch
Ray Tsang
Robert Thornton
Rohan Padhye
Sergey Chernov
Stefan Oehme
Thibaud Lepretre
zhb.

Code Contributors of this release:

Guillaume Nodet
Mickael Istria
Ray Tsang
Stefan Oehme
Joseph Walton
Bo Zhang
AElMehdi
Christian Schulte
Mao Shuai
MartinKanters
Sergey Chernov
Jesse Glick.

Many thanks to all reporters and contributors for their time and support.

(Please send an email to the dev list if we missed one to mention).

Known Issues

None.

Overview about the changes

This release focuses mostly performance improvements, better memory footprint, and less CPU usage.
We are continuing to convert Maven Core to use JSR 330 annotations instead of Plexus
(still not finished, see MNG-5577).
New support for ‘release’ qualifier (see MNG-6655).
The toolchain.xml file supports environment variables (see MNG-6665).

User visible Changes

toolchain.xml now supports usage of environment variables which looks like this:

    jdk
    
      1.8
      sun
    
  ${env.JDK_HOME_8}

The detailed issue list

Bugs:

MNG-6375 – NullPointerException when pom.xml has incomplete XML tag
MNG-6626 – NullPointerException in DefaultExceptionHandler
MNG-6629 – DefaultModelValidator.validateId is inefficient
MNG-6630 – ComparableVersion.parseVersion is inefficient
MNG-6631 – DefaultArtifactVersion.parseVersion is inefficient
MNG-6632 – ArtifactHandlerManager.getArtifactHandler is inefficient
MNG-6633 – ExcludesArtifactFilter is a memory hog
MNG-6636 – NPE on reporting convertion (DefaultReportingConverter) when inheritance of with no reports
MNG-6639 – Child inherit.append.path attributes not defined in Maven POM XSD
MNG-6642 – Tycho-based modules do not build with 3.6.1 (works with 3.6.0)
MNG-6643 – Version comparison CLI does not work anymore
MNG-6644 – NPE in DefaultReportingConverter when reports has no InputLocation (using polyglot Maven)
MNG-6647 – NPE in DefaultReportingConverter (when reports injected by Repaint IO maven-tiles)
MNG-6653 – DefaultProjectBuildingRequest copy constructor does not copy all fields
MNG-6668 – Model location handling uses too much memory
MNG-6669 – Tycho cannot resolve project dependencies
MNG-6700 – Equal compile source roots are added multiple times
MNG-6703 – DefaultUrlNormalizer doesn’t normalize all relative URIs
MNG-6704 – MavenRepositorySystemUtils.newSession() misses assignment
MNG-6707 – Maven XML parser does not accept ‘>’ in XML processing instructions
MNG-6712 – Downgrade maven-resolver:1.4.0 to 1.3.3
MNG-6713 – Fix ExclusionArtifactFilter to respect wildcard
MNG-6716 – relative testSourceDirectory on macos throw duplicate class error
MNG-6720 – MultiThreadedBuilder: wait for parallel running projects when using —fail-fast
MNG-6723 – MavenProject.getParentFile() not set when using ProjectBuilder.build(List, …)

Improvements

MNG-6069 – Migrate to non deprecated parts of Commons CLI
MNG-6638 – Prevent reparsing POMs in MavenMetadataSource
MNG-6655 – Add support for “release” qualifier
MNG-6665 – toolchain.xml file should support environment variables
MNG-6667 – Hint at Maven upgrade requirement when trying to build a pom.xml with a newer modelVersion
MNG-6675 – Make Resolver debug log messages for projects and plugins consistent
MNG-6695 – Improve speed in collection merging
MNG-6696 – Speed improvements while parsing big reactor projects
MNG-6697 – Add a fast interpolator not using reflection
MNG-6698 – Lazily compute the ManagedVersionMap
MNG-6701 – Document maven.repo.local system property
MNG-6702 – Improve DefaultModelValidator performance
MNG-6705 – Speep up Artifact version check and Parent interpolation
MNG-6718 – Upgrade Plexus Utils to 3.2.1
MNG-6729 – StringSearchModelInterpolator introspects objects from Java API
MNG-6747 – Generalize ‘resume from’ message when build reactor fails

Test

MNG-6535 – Improve test coverage of org.apache.maven.model.path.DefaultUrlNormalizer

Wish

Task

MNG-6681 – improve documentation: dependency type = file classifier(optional)+extension + additional hints on dependency features

Dependency upgrade

MNG-6549 – Remove unused transitive dependencies of Guava
MNG-6627 – upgrade plexus-component-metadata to 2.0.0 to get reproducible META-INF/plexus/components.xml
MNG-6646 – Upgrade maven-assembly-plugin to 3.1.1
MNG-6671 – Upgrade Modello to 1.11
MNG-6674 – Upgrade Wagon to 3.3.3
MNG-6738 – Upgrade maven-resolver to 1.4.1

Sub Tasks

MNG-6680 – Convert Maven Settings Builder to JSR 330
MNG-6685 – Convert Maven Model Builder to JSR 330
MNG-6686 – Convert Maven Embedder to JSR 330

The full list of changes can be found in our issue management system.

Complete Release Notes

See complete release notes for all versions

The Apache Maven Team.