使用 GCSUtil 写入文件时，如何修复有关线程组仍然运行的 Maven 警告？

Question

我写了个简单的program to write a text file to GCS using GCSUtil

我运行程序使用mvn:exec

mvn exec:java -Dexec.mainClass="dataflow.GCSRunningThreads" -Dexec.args=--output=gs://my-bucket/tmp/hello_world

Maven 退出并出现以下错误

[WARNING] thread Thread[pool-1-thread-1,5,dataflow.GCSRunningThreads] was interrupted but is still alive after waiting at least 15000msecs
[WARNING] thread Thread[pool-1-thread-1,5,dataflow.GCSRunningThreads] will linger despite being asked to die via interruption
[WARNING] NOTE: 1 thread(s) did not finish despite being asked to  via interruption. This is not a problem with exec:java, it is a problem with the running code. Although not serious, it should be remedied.
[WARNING] Couldn't destroy threadgroup org.codehaus.mojo.exec.ExecJavaMojo$IsolatedThreadGroup[name=dataflow.GCSRunningThreads,maxpri=10]
java.lang.IllegalThreadStateException
    at java.lang.ThreadGroup.destroy(ThreadGroup.java:775)
    at org.codehaus.mojo.exec.ExecJavaMojo.execute(ExecJavaMojo.java:328)
    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: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: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)
[INFO] ------------------------------------------------------------------------

我该如何解决这个问题？

Answer 1

要解决此问题，您需要关闭 GcsUtil 使用的 ExecutorService。以下代码段有效：

GcsOptions gcsOptions = options.as(GcsOptions.class);
gcsOptions.getExecutorService().shutdown();
try {
  gcsOptions.getExecutorService().awaitTermination(3, TimeUnit.MINUTES);
} catch (InterruptedException e) {
  sLogger.error("Thread was interrupted waiting for execution service to shutdown.");
}

GCSUtil 使用执行器服务异步处理 IO 操作。我们需要关闭该执行程序服务以便干净地退出。

Answer 2

您是否尝试在您的 pom 中设置以下属性（或通过命令行传递）。

cleanupDaemonThreads = false

检查这个问题， Running daemon with exec-maven-plugin avoiding `IllegalThreadStateException`

使用 GCSUtil 写入文件时，如何修复有关线程组仍然运行的 Maven 警告？

How to fix maven warning about thread group still running when using GCSUtil to write files?

maven

google-cloud-dataflow

使用 GCSUtil 写入文件时，如何修复有关线程组仍然 运行 的 Maven 警告？

How to fix maven warning about thread group still running when using GCSUtil to write files?

maven

google-cloud-dataflow

使用 GCSUtil 写入文件时，如何修复有关线程组仍然运行的 Maven 警告？