java - 尝试在 Maven 发布准备和执行任务上运行并行构建时出现 Ger 错误？

Question

我发现了一些提高标准 Maven 构建速度的方法，例如仅构建已更改的模块并利用并行构建。对于任务:

干净发布:准备发布:执行

这需要一段时间，我想加快速度。并行构建似乎不起作用，我收到错误。运行并行构建时出现的错误是:

[ERROR] NullPointerException
[ERROR] java.util.concurrent.ExecutionException: java.lang.NullPointerException

运行命令时:

clean -T 1C release:prepare release:perform

这似乎是我遇到的唯一错误 - 不知道为什么？当我使用此标志运行正常构建时，这不是问题。

还有关于如何加快此过程的任何建议吗？我假设我可以跳过测试，并且在与 master 合并之前，它们已经在 dev 分支的构建上完成了？

编辑:添加了以下带有调试标志的错误消息:

[INFO] Final Memory: 42M/304M
[INFO] ------------------------------------------------------------------------
[ERROR] NullPointerException
java.lang.NullPointerException
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.calcImports (DefaultMavenPluginManager.java:470)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupPluginRealm (DefaultMavenPluginManager.java:355)
    at org.apache.maven.plugin.DefaultBuildPluginManager.getPluginRealm (DefaultBuildPluginManager.java:231)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:102)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:200)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:196)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
[ERROR] java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException
    at java.util.concurrent.FutureTask.report (FutureTask.java:122)
    at java.util.concurrent.FutureTask.get (FutureTask.java:192)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.multiThreadedProjectTaskSegmentBuild (MultiThreadedBuilder.java:140)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.build (MultiThreadedBuilder.java:101)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.NullPointerException
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.calcImports (DefaultMavenPluginManager.java:470)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupPluginRealm (DefaultMavenPluginManager.java:355)
    at org.apache.maven.plugin.DefaultBuildPluginManager.getPluginRealm (DefaultBuildPluginManager.java:231)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:102)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:200)
    at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call (MultiThreadedBuilder.java:196)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call (Executors.java:511)
    at java.util.concurrent.FutureTask.run (FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:624)
    at java.lang.Thread.run (Thread.java:748)
[ERROR] 

Answer 1

感谢@khmarbaise 建议修复。这个问题可以用最新的maven版本解决，可以在3.6.1版本的发行说明中看到描述

http://maven.apache.org/docs/3.6.1/release-notes.html