[HBASE-4831] LRU stats thread should be a daemon thread

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Prakash Khemani
• Created: 20/Nov/11 03:03
• Updated: 12/Jun/22 19:52
• Resolved: 20/Nov/11 19:31

Description

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)