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  1. HBase
  2. HBASE-23364

HRegionServer sometimes does not shut down.

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      Note that I initially assumed this to be a Phoenix bug. But I tracked it down to HBase.


      I noticed that recently only. Latest build from HBase's branch-1 and latest build from Phoenix' 4.x-HBase-1.5. I don't know, yet, whether it's a Phoenix or an HBase issues.

      Just filing it here for later reference.

      jstack show this thread as the only non-daemon thread:

      "pool-11-thread-1" #470 prio=5 os_prio=0 tid=0x0000558a709a4800 nid=0x238e waiting on condition [0x00007f213ad68000]
         java.lang.Thread.State: WAITING (parking)
              at sun.misc.Unsafe.park(Native Method)
              - parking to wait for  <0x000000058eafece8> (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)

      No other information. Somebody created a thread pool somewhere and forgot to set the threads to daemon or is not shutting down the pool properly.

      Edit: I looked for other reference of the locked objects in the stack dump, but didn't find any.

       

       

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        1. 23364-branch-1.txt
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          Lars Hofhansl

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              • Assignee:
                larsh Lars Hofhansl
                Reporter:
                larsh Lars Hofhansl
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