_posts/2019-04-13-apache-maven-core-3-6.html

--- layout: post status: PUBLISHED published: true title: Apache Maven Release 3.6.1 id: 42ff76fe-9dcc-4bf5-89e1-73791af53260 date: '2019-04-13 11:08:32 -0400' categories: maven tags: - maven-core-release permalink: maven/entry/apache-maven-core-3-6 --- <div class="entry-content"> <p>The Apache Maven team is pleased to announce the release of the Apache<br /> Maven 3.6.1.</p> <p>Apache Maven is a software project management and comprehension tool. Based<br /> on the concept of a project object model (POM), Maven can manage a<br /> project’s build, reporting and documentation from a central piece of<br /> information.</p> <p>You can find out more about Apache Maven at <a href="https://maven.apache.org">https://maven.apache.org</a></p> <p>You can download the appropriate sources etc. from<br /> the <a href="https://maven.apache.org/download.cgi">download page</a></p> <p></p> <p>We really value the contributions of these non committers, so this section is<br /> focused on those individuals. Descriptions of the issues fixed can be found at<br /> the <a href="#Details">end of these release notes</a>.</p> <p>Issue Reporters of this release:</p> <ul> <li><a href="http://issues.apache.org/jira/browse/MNG-5705">MNG-5705</a> Ondra Žižka</li> <li><a href="http://issues.apache.org/jira/browse/MNG-5965">MNG-5965</a> Matthias Schmalz</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6059">MNG-6059</a> Andreas Sewe</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6159">MNG-6159</a> Christian Aistleitner</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6213">MNG-6213</a> Jin Kwon</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6256">MNG-6256</a> Christoph Etzel</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6261">MNG-6261</a> Dawid Weiss</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6262">MNG-6262</a> Gene Smith</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6346">MNG-6346</a> Patrik Jetzer</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6374">MNG-6374</a> Rohan Padhye</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6495">MNG-6495</a> Elliotte Rusty Harold</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6506">MNG-6506</a> Andreas Veithen</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6526">MNG-6526</a> Olaf Otto</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6529">MNG-6529</a> Michael Istria</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6530">MNG-6530</a> Michael Istria</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6533">MNG-6533</a> Michael Istria</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6543">MNG-6543</a> Romain Manni-Bucau</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6558">MNG-6558</a> Guy Brand</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6577">MNG-6577</a> Rohan Padhye</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6591">MNG-6591</a> Olaf Otto</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6605">MNG-6605</a> Gunnar Wagenknecht</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6618">MNG-6618</a> Viacheslav Yakunin</li> </ul> <p>Code Contributors of this release:</p> <ul> <li><a href="http://issues.apache.org/jira/browse/MNG-6374">MNG-6374</a> Gabriel Belingueres (indirectly via plexus-utils PR)</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6529">MNG-6529</a> Michael Istria</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6530">MNG-6530</a> Michael Istria</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6558">MNG-6558</a> Guy Brand</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6261">MNG-6261</a> Fabiano C. de Oliveira</li> <li><a href="http://issues.apache.org/jira/browse/MNG-6533">MNG-6533</a> Michael Istria</li> </ul> <p>Many thanks to all reporters and contributors for their time and support.</p> <p>(Please send an email to the dev list if we missed one to mention).</p> <h2>Preliminary Testers</h2> <p>Thanks to the following preliminary testers:</p> <ul> <li>Gabriel Belingueres</li> <li>Francois Papon</li> <li>Eric Lilja</li> </ul> <h2>Known Issues</h2> <p>If you are using Maven reporting, it might happen that you will get an exception which looks like this:</p> <figure class='code'> <div class="highlight"> <table> <tr> <td class="gutter"> <pre class="line-numbers"><span class='line-number'>1</span> <span class='line-number'>2</span> <span class='line-number'>3</span> <span class='line-number'>4</span> <span class='line-number'>5</span> <span class='line-number'>6</span> <span class='line-number'>7</span> <span class='line-number'>8</span> </pre> </td> <td class='code'> <pre><code class=''><span class='line'>[INFO] Scanning for projects... </span><span class='line'>[ERROR] Internal error: java.lang.NullPointerException -> [Help 1] </span><span class='line'>org.apache.maven.InternalErrorException: Internal error: java.lang.NullPointerException </span><span class='line'> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:120) </span><span class='line'>... </span><span class='line'>Caused by: java.lang.NullPointerException </span><span class='line'> at org.apache.maven.model.plugin.DefaultReportingConverter.convert (DefaultReportingConverter.java:243) </span><span class='line'>...</span></code></pre> </td> </tr> </table> </div> </figure> <p>This is caused by using a <code><reportSet>..</reportSet></code> which does not contain<br /> a <code><report></report></code> element.</p> <p>Temporarily this issue can circumvented by adding an empty <code><report></report></code> element<br /> inside the <code><reportSet></reportSet></code>.</p> <p>An <a href="https://issues.apache.org/jira/browse/MNG-6636">issue has been created</a> to track the fix.</p> <h2>Overview about the changes</h2> <ul> <li> <p>An issue has been fixed causing multiple executions of plugin goals, related to<br /> using parallel build options like <code>mvn plugin:goal -T 4</code>. This resulted in duplicated<br /> executions of phases. This has been fixed with <a href="http://issues.apache.org/jira/browse/MNG-5965">MNG-5965</a>.</p> </li> <li> <p>NullPointerException related to call in parallel build like <code>mvn -T 1C clean javadoc:aggregate</code><br /> <a href="http://issues.apache.org/jira/browse/MNG-5705">MNG-5705</a></p> </li> <li> <p>A performance issue related to artifact transfer has been found related to <a href="http://issues.apache.org/jira/browse/WAGON-537">WAGON-537</a>. It<br /> has been solved via the update to <a href="http://issues.apache.org/jira/browse/MNG-6526">Maven Wagon 3.3.1</a>.</p> </li> <li> <p>There had been issues related calling Maven script like this: <code>mvn -f ..</code></p> <ul> <li>Having parentheses within the path, which has been fixed with <a href="http://issues.apache.org/jira/browse/MNG-6346">MNG-6346</a>.</li> <li>Script can break having special characters as part of the path, which has<br /> been solved with <a href="http://issues.apache.org/jira/browse/MNG-6256">MNG-6256</a>.</li> </ul> </li> <li> <p>Issue related to the Maven Resolver API which broke some IDEs (for example <a href="https://youtrack.jetbrains.com/issue/IDEA-201282">https://youtrack.jetbrains.com/issue/IDEA-201282</a>);<br /> this has been fixed by <a href="http://issues.apache.org/jira/browse/MNG-6538">MNG-6538</a>.</p> </li> <li> <p>Issue related to missing event for ToolchainsBuildingResult on EventSpy <a href="http://issues.apache.org/jira/browse/MNG-6558">MNG-6558</a>.</p> </li> <li> <p>Issue related to support Java 9+ <code>ClassLoader.findClass(String moduleName, String name)</code> in Mojos.<br /> This has been fixed with <a href="http://issues.apache.org/jira/browse/MNG-6543">MNG-6543</a>.</p> </li> <li> <p>Improvement about the memory consumption has been done with <a href="http://issues.apache.org/jira/browse/MNG-6571">MNG-6571</a>.</p> </li> <li> <p>Issue related to relative parent POM resolution failing in 3.5.0 with complex multimodule builds<br /> has been fixed with <a href="http://issues.apache.org/jira/browse/MNG-6261">MNG-6261</a>.</p> </li> <li> <p>Missing export for org.slf4j.event.Level has been done with <a href="http://issues.apache.org/jira/browse/MNG-6618">MNG-6618</a></p> </li> </ul> <h2>User visible Changes</h2> <p>Maven has now a an option to suppress the transfer progress when downloading/uploading<br /> in interactive mode.</p> <figure class='code'> <div class="highlight"> <table> <tr> <td class="gutter"> <pre class="line-numbers"><span class='line-number'>1</span> </pre> </td> <td class='code'> <pre><code class=''><span class='line'>mvn --no-transfer-progress ....</span></code></pre> </td> </tr> </table> </div> </figure> <p>or in short:</p> <figure class='code'> <div class="highlight"> <table> <tr> <td class="gutter"> <pre class="line-numbers"><span class='line-number'>1</span> </pre> </td> <td class='code'> <pre><code class=''><span class='line'>mvn -ntp ... ....</span></code></pre> </td> </tr> </table> </div> </figure> <p>There had been an issues like <a href="http://issues.apache.org/jira/browse/MNG-6505">MNG-6505</a> and <a href="http://issues.apache.org/jira/browse/MNG-6059">MNG-6059</a> related to the construction of<br /> URL’s etc. within <code>distributionManagement</code> and <code>scm</code> part in the pom for multi module<br /> builds like this:</p> <figure class='code'> <div class="highlight"> <table> <tr> <td class="gutter"> <pre class="line-numbers"><span class='line-number'>1</span> <span class='line-number'>2</span> <span class='line-number'>3</span> <span class='line-number'>4</span> <span class='line-number'>5</span> <span class='line-number'>6</span> </pre> </td> <td class='code'> <pre><code class=''><span class='line'><scm child.scm.connection.inherit.append.path="true" </span><span class='line'> child.scm.developerConnection.inherit.append.path="true" </span><span class='line'> child.scm.url.inherit.append.path="true" /> </span><span class='line'><distributionManagement> </span><span class='line'> <site child.site.url.inherit.append.path="true" /> </span><span class='line'> </distributionManagement></span></code></pre> </td> </tr> </table> </div> </figure> <p>Detailed explanations can be found in <a href="https://maven.apache.org/ref/3.6.1/maven-model-builder/index.html#Inheritance_Assembly">Inheritance Assembly</a> and in <a href="http://issues.apache.org/jira/browse/MNG-6059">MNG-6059</a></p> <h2>The detailed issue list<a href="#Details"></a></h2> <h3>Bugs:</h3> <ul> <li><a href="https://issues.apache.org/jira/browse/MNG-5705">MNG-5705</a> – NPE on parallel build in BuilderCommon.handleBuildError(BuilderCommon.java:147)</li> <li><a href="https://issues.apache.org/jira/browse/MNG-5965">MNG-5965</a> – Parallel build multiplies work if multiple goals are given</li> <li><a href="https://issues.apache.org/jira/browse/MNG-5995">MNG-5995</a> – Maven itself cannot run without maven-compat</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6256">MNG-6256</a> – Maven script can break if “-f” path contains special characters</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6261">MNG-6261</a> – Relative parent POM resolution failing in 3.5.0 with complex multimodule builds</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6262">MNG-6262</a> – getCanonicalFile() is not used consistently during project resolution</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6346">MNG-6346</a> – … was unexpected at this time when using -f option and path contains brackets</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6374">MNG-6374</a> – ModelBuilder hangs with malformed pom.xml</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6429">MNG-6429</a> – Integration Test site publishing requires Java 7 (or javadoc errors ignored)</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6495">MNG-6495</a> – ModelResolver cannot be null</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6505">MNG-6505</a> – child.(x.y).inherit.append.path value should be inherited</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6506">MNG-6506</a> – Mojos are unable to load package annotations on Java >= 9</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6529">MNG-6529</a> – <code>ProjectBuilder.build(List<File> projects, boolean, ProjectBuildingRequest)</code> doesn’t honor <code>ProjectBuildingRequest.isResolveDependencies()</code></li> <li><a href="https://issues.apache.org/jira/browse/MNG-6530">MNG-6530</a> – Regression in ProjectBuilder when file change between invocations (introduced by MNG-6311)</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6533">MNG-6533</a> – <code>ProjectBuilder.build(list_of_projects,...)</code> does not contain MavenProject in exception report</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6543">MNG-6543</a> – Upgrade plexus classworld to support java 9+ <code>ClassLoader.findClass(String moduleName, String name)</code> in Mojos</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6558">MNG-6558</a> – ToolchainsBuildingResult event is not sent on EventSpy</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6577">MNG-6577</a> – pom.xml: Uncaught IllegalArgumentException when parsing unicode entity ref</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6590">MNG-6590</a> – DefaultProjectArtifactsCache java.lang.IllegalStateException: Duplicate artifact resolution result</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6599">MNG-6599</a> – unknown version in model id when version is defined from parent</li> </ul> <h3>Improvements</h3> <ul> <li><a href="https://issues.apache.org/jira/browse/MNG-6059">MNG-6059</a> – Important use cases not covered, as child.inherit.append.path affects all children</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6159">MNG-6159</a> – Child path adjustments break git scm urls</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6213">MNG-6213</a> – Maven doesn’t check the validity of scope value</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6481">MNG-6481</a> – Allow to compile and test Maven with Java 11</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6513">MNG-6513</a> – Replace depreated Plexus javadoc tags with annotations in ITs</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6515">MNG-6515</a> – Fix javadoc build errors under Java 8 and 11</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6520">MNG-6520</a> – Update assembly descriptors to 2.0.0</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6522">MNG-6522</a> – Prepare Maven’s Core Integration Test Suite to test with Java 12 and 13-ea</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6572">MNG-6572</a> – use int or long instead of BigIntegers for little numbers in ComparableVersion</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6593">MNG-6593</a> – track input location for super-pom</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6597">MNG-6597</a> – add input location tracking for plugins configuration</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6600">MNG-6600</a> – add input location tracking for default lifecycle bindings executions</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6601">MNG-6601</a> – add input location tracking for site’s reportPlugins injected by reports conversion</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6605">MNG-6605</a> – Allow to suppress download messages in interactive mode</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6611">MNG-6611</a> – Update animal-sniffer-maven-plugin to 1.17</li> </ul> <h3>Wish</h3> <ul> <li><a href="https://issues.apache.org/jira/browse/MNG-6571">MNG-6571</a> – Maven memory consumption issue</li> </ul> <h3>Task</h3> <ul> <li><a href="https://issues.apache.org/jira/browse/MNG-6538">MNG-6538</a> – Upgrade Maven Artifact Resolver to 1.3.3 to restore API</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6544">MNG-6544</a> – Replace CacheUtils#{eq,hash} with Objects</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6573">MNG-6573</a> – Use latest Maven 3.6.0 to build Maven Core and plugins with ASF CI</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6618">MNG-6618</a> – Maven doesn’t export org.slf4j.event.Level</li> </ul> <h3>Dependency upgrade</h3> <ul> <li><a href="https://issues.apache.org/jira/browse/MNG-6526">MNG-6526</a> – Upgrade to Wagon 3.3.1 (from 3.2.0)</li> <li><a href="https://issues.apache.org/jira/browse/MNG-6591">MNG-6591</a> – Upgrade to Wagon 3.3.2</li> </ul> <p>The full list of changes can be found in our <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12344378&projectId=12316922">issue management system</a>.</p> <h2>Complete Release Notes</h2> <p>See <a href="../../docs/history.html">complete release notes for all versions</a></p> <ul> <li>The Apache Maven Team.</li> </ul> </div>

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