java - Maven测试挂起

Question

我在从 Maven 运行单元测试时遇到了一个奇怪的问题。我有一组单元测试，如果逐个运行，它们可以完美运行。然而，当我从 Maven(mvn 测试)运行它们时，它会挂起(永远阻塞)。

它始终卡在该测试使用的 A 类中的同一点(同一测试类)。我尝试从 A.class 中删除日志创建，测试开始成功运行。这是行:

private static final Logger log = LoggerFactory.getLogger(A.class);

这是线程转储:

"main" prio=6 tid=0x00446c00 nid=0x1278 runnable [0x00a2f000]
   java.lang.Thread.State: RUNNABLE
        at java.lang.ProcessImpl.waitFor(Native Method)
        at org.codehaus.plexus.util.cli.CommandLineUtils.executeCommandLine(CommandLineUtils.java:173)
        at org.codehaus.plexus.util.cli.CommandLineUtils.executeCommandLine(CommandLineUtils.java:114)
        at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:231)
        at org.apache.maven.plugin.surefire.booterclient.ForkStarter.runSuitesForkOnce(ForkStarter.java:125)
        at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:109)
        at org.apache.maven.plugin.surefire.SurefirePlugin.execute(SurefirePlugin.java:619)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        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:319)
        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:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        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)

我不知道从这里该去哪里。欢迎提出任何建议。

Answer 1

可能是资源死锁？鉴于有关另一个 Maven 进程正在生成的评论，这可能表明该去哪里。您可以尝试将同步放在测试中的某处(或所有方法上)，看看它是否消失。如果是这样，则可能是死锁。