“threadName“ Id=threadId WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$**报错

        使用线程池ScheduledThreadPoolExecutor，线程池中的某个线程的状态如下。原本以为是线程中的程序代码执行过程中引起的如下错误，经排查是线程执行过程出现异常导致线程的run方法结束，而该线程属于线程池中的核心线程，不会被回收销毁，是一直处于等到处理任务的状态。

使用arthas查看线程状态

[arthas@39536]$ thread 12
"threadName_2" Id=12 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@53b568e8
    at sun.misc.Unsafe.park(Native Method)
    -  waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@53b568e8
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1081)
    at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)