[HBASE-4745] LRU Statistics thread should be daemon

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.92.0, 0.94.0
• Hadoop Flags: Reviewed
• Assignee: Andrew Kyle Purtell
• Reporter: Ted Yu
• Created: 03/Nov/11 23:36
• Updated: 12/Oct/12 05:35
• Resolved: 05/Nov/11 01:50

Description

Here was from 'HBase 0.92/Hadoop 0.22 test results' discussion on dev@hbase

"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)

We should make this thread daemon thread.