Java 尽管通过中断请求线程死亡，但线程仍将继续存在

发布于01月09日

我有一些如下所示的Java代码:

IntStream.range(0, N)
        .parallel()
        .forEach(
            i -> {
// do some work
            });

并在运行此代码时看到以下警告:

[WARNING] thread Thread[#73,ForkJoinPool.commonPool-worker-8,5,] was interrupted but is still alive after waiting at least 15000msecs
[WARNING] thread Thread[#73,ForkJoinPool.commonPool-worker-8,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#74,ForkJoinPool.commonPool-worker-9,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#75,ForkJoinPool.commonPool-worker-10,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#76,ForkJoinPool.commonPool-worker-11,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#77,ForkJoinPool.commonPool-worker-12,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#78,ForkJoinPool.commonPool-worker-13,5,] will linger despite being asked to die via interruption
[WARNING] thread Thread[#79,ForkJoinPool.commonPool-worker-14,5,] will linger despite being asked to die via interruption
[WARNING] NOTE: 7 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.

在不复制粘贴lambda中的所有代码的情况下，我无法提供一个可重复性最低的示例，这是不可行的，但我已经验证了以下内容:

在lambda中没有抛出异常
如果我使用mvn spring-boot:run运行我的应用程序，警告就会消失，但如果应用程序通过mvn exec:java执行，警告就会出现.据我所知，前者会产生一个新的JVM，而后者不会.

如果有任何帮助或提示来解决这个问题，我将不胜感激.

Thread bootstrapThread = new Thread( threadGroup, () -> { int sepIndex = mainClass.indexOf('/'); final String bootClassName; ... mainHandle.invoke(arguments); // runs our main class ... bootstrapThread.start(); joinNonDaemonThreads(threadGroup); ...

// executed as a result of call to joinNonDaemonThreads if (thread.isAlive()) // generally abnormal { getLog().warn("thread " + thread + " was interrupted but is still alive after waiting at least " + timeoutMsecs + "msecs"); }

Java 尽管通过中断请求线程死亡，但线程仍将继续存在

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