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Xiaolin Ha edited comment on HBASE-22881 at 10/18/19 12:27 PM: --------------------------------------------------------------- Above is from dump of our testing cluster. And in my UT which I worked recently, I also found not daemon threads in master. But I could not find out where the problem is now. I will dig more. was (Author: xiaolin ha): Above is from dump of our test cluster. And in my UT which I worked recently, I also found not daemon threads in master. But I could not find out where the problem is now. I will dig more. > Fix non-daemon threads in hbase server implementation > ----------------------------------------------------- > > Key: HBASE-22881 > URL: https://issues.apache.org/jira/browse/HBASE-22881 > Project: HBase > Issue Type: Bug > Components: master > Reporter: Xiaolin Ha > Assignee: Xiaolin Ha > Priority: Major > Fix For: 3.0.0, 2.3.0, 2.2.1, 2.1.7 > > > "pool-8-thread-3" #7252 prio=5 os_prio=0 tid=0x00007f91040044c0 nid=0xd71e > waiting on condition [0x00007f8f4d209000] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <0x00000005c0e49ed0> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > Locked ownable synchronizers: > - None > "pool-8-thread-2" #7251 prio=5 os_prio=0 tid=0x00007f910c010be0 nid=0xd71d > waiting on condition [0x00007f8f4daab000] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <0x00000005c0e49ed0> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > Locked ownable synchronizers: > - None > "pool-8-thread-1" #7250 prio=5 os_prio=0 tid=0x00007f91000019d0 nid=0xd71c > waiting on condition [0x00007f8f4da6a000] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <0x00000005c0e49ed0> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > Locked ownable synchronizers: > - None > "pool-5-thread-3" #7248 prio=5 os_prio=0 tid=0x00007f9238005ad0 nid=0xd71a > waiting on condition [0x00007f8f4cb65000] > java.lang.Thread.State: WAITING (parking) > at sun.misc.Unsafe.park(Native Method) > - parking to wait for <0x00000005c0ec51e0> (a > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) > at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) > at > java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) > at > java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) > at > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) -- This message was sent by Atlassian Jira (v8.3.4#803005)