LRU Statistics thread should be daemon
--------------------------------------
Key: HBASE-4745
URL: https://issues.apache.org/jira/browse/HBASE-4745
Project: HBase
Issue Type: Bug
Reporter: Ted Yu
Fix For: 0.92.0
Here was from 'HBase 0.92/Hadoop 0.22 test results' discussion on dev@hbase
{code}
"LRU Statistics #0" prio=10 tid=0x00007f4edc7dd800 nid=0x211a waiting
on condition [0x00007f4e631e2000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00007f4e88acc968> (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$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
at
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
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:619)
{code}
We should make this thread daemon thread.
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