maven-release-plugin无法释放:准备

Question

我正在使用mercurial,maven和maven-release-plugin来发布.执行任务时,release:prepare它会失败并显示以下堆栈跟踪:

[INFO] Transforming 'producer'...
[INFO] Not removing release POMs
[INFO] Checking in modified POMs...
[INFO] EXECUTING: /bin/sh -c cd /home/dir/producer && hg branch
[DEBUG] version-1.1
[INFO] EXECUTING: /bin/sh -c cd /home/dir/producer && hg outgoing
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2:16.923s
[INFO] Finished at: Tue Jun 30 16:00:45 MSK 2015
[INFO] Final Memory: 10M/207M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.5:prepare (default-cli) on project producer: An error is occurred in the checkin process: Exception while executing SCM command. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.5:prepare (default-cli) on project producer: An error is occurred in the checkin process: Exception while executing SCM command.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.MojoExecutionException: An error is occurred in the checkin process: Exception while executing SCM command.
    at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:281)
    at org.apache.maven.plugins.release.PrepareReleaseMojo.execute(PrepareReleaseMojo.java:232)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more
Caused by: org.apache.maven.shared.release.ReleaseExecutionException:     An error is occurred in the checkin process: Exception while executing SCM command.
    at org.apache.maven.shared.release.phase.AbstractScmCommitPhase.checkin(AbstractScmCommitPhase.java:160)
    at org.apache.maven.shared.release.phase.AbstractScmCommitPhase.performCheckins(AbstractScmCommitPhase.java:145)
    at org.apache.maven.shared.release.phase.ScmCommitDevelopmentPhase.runLogic(ScmCommitDevelopmentPhase.java:91)
    at org.apache.maven.shared.release.phase.AbstractScmCommitPhase.execute(AbstractScmCommitPhase.java:78)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:234)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:169)
    at     org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:146)
    at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:107)
    at org.apache.maven.plugins.release.PrepareReleaseMojo.prepareRelease(PrepareReleaseMojo.java:277)
    ... 22 more
Caused by: org.apache.maven.scm.ScmException: Exception while executing SCM command.
    at org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:63)
    at org.apache.maven.scm.provider.hg.HgScmProvider.checkin(HgScmProvider.java:223)
    at org.apache.maven.scm.provider.AbstractScmProvider.checkIn(AbstractScmProvider.java:415)
    at org.apache.maven.shared.release.phase.AbstractScmCommitPhase.checkin(AbstractScmCommitPhase.java:156)
    ... 30 more
Caused by: java.lang.NullPointerException
    at org.apache.maven.scm.provider.hg.HgUtils.differentOutgoingBranchFound(HgUtils.java:313)
    at org.apache.maven.scm.provider.hg.command.checkin.HgCheckInCommand.executeCheckInCommand(HgCheckInCommand.java:66)
    at org.apache.maven.scm.command.checkin.AbstractCheckInCommand.executeCommand(AbstractCheckInCommand.java:54)
    at org.apache.maven.scm.command.AbstractCommand.execute(AbstractCommand.java:59)
    ... 33 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions,     please read the following articles:
[ERROR] [Help 1]     http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

运行后:

mvn -X clean release:prepare

• mvn版本:Apache Maven 3.0.4
• hg版本:Mercurial Distributed SCM(版本2.0.2)

• maven-release-plugin版本:

  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-release-plugin</artifactId>
  <version>2.5</version>
  

我花了几个小时......发现与我的情况无关,完全陷入困境.看起来它无法执行hg传出,但在失败后我可以执行hg传出没有问题.

更奇怪的是,我可以在具有相同hg和mvn版本的另一台机器上成功运行它.

我发现的唯一区别是我在第一个盒子Ubuntu 12.04.5 LTS和第二个盒子上Ubuntu 12.04.3 LTS.这是Ubuntu 12.04.5的问题吗？希望不是.但那真是太奇怪了.