java unsafe park_java – WAITING at sun.misc.Unsafe.park(Native Method)

我的一个应用程序在一段负载运行的时间内挂起，有谁知道在jstack中可能会导致这样的输出：

"scheduler-5" prio=10 tid=0x00007f49481d0000 nid=0x2061 waiting on condition [0x00007f494e8d0000]

java.lang.Thread.State: WAITING (parking)

at sun.misc.Unsafe.park(Native Method)

- parking to wait for <0x00000006ee117310> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)

at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)

at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)

at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1085)

at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:807)

at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1043)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1103)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)

at java.lang.Thread.run(Thread.java:722)

在挂起时，我在jstack输出中看到很多。

我大量使用Spring @Async&地图，同步地图和ehcache。

有趣的是只在一个应用程序实例上发生。两个人跑得很好。

在这种情况下，还可以调查哪些更多细节？