在 Maven 发布准备和执行任务中尝试 运行 并行构建时出错？
Ger error when trying to run parallel builds on maven release prepare and perform task?
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和利用并行构建。对于任务：
clean release:prepare release:perform
这需要一段时间，我想加快速度。似乎并行构建不起作用我收到错误消息。
运行ning 并行构建时出现的错误是：
[ERROR] NullPointerException
[ERROR] java.util.concurrent.ExecutionException: java.lang.NullPointerException
当 运行ning 命令时：
clean -T 1C release:prepare release:perform
这似乎是我遇到的唯一错误 - 不确定为什么？当我 运行 使用此标志进行正常构建时，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 分支上的构建中完成了？
编辑：添加了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.call (MultiThreadedBuilder.java:200)
at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.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.call (MultiThreadedBuilder.java:200)
at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.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]
感谢@khmarbaise 建议修复。这可以用最新的 maven 版本解决，可以在版本 3.6.1
的发行说明中看到描述
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和利用并行构建。对于任务：
clean release:prepare release:perform
这需要一段时间，我想加快速度。似乎并行构建不起作用我收到错误消息。 运行ning 并行构建时出现的错误是：
[ERROR] NullPointerException
[ERROR] java.util.concurrent.ExecutionException: java.lang.NullPointerException
当 运行ning 命令时：
clean -T 1C release:prepare release:perform
这似乎是我遇到的唯一错误 - 不确定为什么？当我 运行 使用此标志进行正常构建时，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 分支上的构建中完成了？
编辑：添加了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.call (MultiThreadedBuilder.java:200)
at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.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.call (MultiThreadedBuilder.java:200)
at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.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]
感谢@khmarbaise 建议修复。这可以用最新的 maven 版本解决，可以在版本 3.6.1
的发行说明中看到描述