ActiveMQ BrokerService[doeisBroker]

Question

"ActiveMQ BrokerService[doeisBroker] Task-855" daemon prio=10 tid=0x00007f67e624f000 nid=0x3b6 waiting for monitor entry [0x00007f67beb6a000]

   java.lang.Thread.State: BLOCKED (on object monitor)

at org.apache.activemq.broker.region.PrefetchSubscription.dispatchPending(PrefetchSubscription.java:653)

- waiting to lock <0x0000000661e346e0> (a java.lang.Object)

- locked <0x00000006614ff020> (a java.lang.Object)

at org.apache.activemq.broker.region.PrefetchSubscription.add(PrefetchSubscription.java:161)

at org.apache.activemq.broker.region.Queue.doActualDispatch(Queue.java:1998)

at org.apache.activemq.broker.region.Queue.doDispatch(Queue.java:1946)

at org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:2086)

at org.apache.activemq.broker.region.Queue.iterate(Queue.java:1581)

- locked <0x0000000660f3e080> (a java.lang.Object)

at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)

at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

Answer 1

进程阻塞了，dump堆信息，看一下
0x0000000661e346e0被谁锁了