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From "Prakash Khemani (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4831) LRU stats thread should be a daemon thread
Date Sun, 20 Nov 2011 03:03:53 GMT
LRU stats thread should be a daemon thread
------------------------------------------

                 Key: HBASE-4831
                 URL: https://issues.apache.org/jira/browse/HBASE-4831
             Project: HBase
          Issue Type: Bug
            Reporter: Prakash Khemani
            Assignee: Prakash Khemani


I have seen the hung processes where the following was the only non-daemon thread


"LRU Statistics #0" prio=10 tid=0x00002ab0bc04f800 nid=0x11ac waiting on condition [0x0000000042f57000]
   java.lang.Thread.State: TIMED_WAITING (parking)
  at sun.misc.Unsafe.park(Native Method)
  - parking to wait for  <0x00002aaab9a1c000> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
  at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
  at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
  at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:609)
  at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:602)
  at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
  at java.lang.Thread.run(Thread.java:662)

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