[HBASE-10563] Set name for FlushHandler thread

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.0
• Fix Version/s: 0.96.2, 0.98.1, 0.99.0
• Component/s: regionserver
• Assignee: Himanshu Vashishtha
• Reporter: Himanshu Vashishtha
• Created: 18/Feb/14 06:21
• Updated: 21/Feb/15 23:30
• Resolved: 18/Feb/14 15:01

Description

The FlushHandler thread in MemStoreFlusher class uses default thread name (Thread -XX). This is un-intentional and also confusing in case when there are multiple handlers.

Current Stack trace looks like this:

"Thread-18" prio=10 tid=0x00007f4e8cb21800 nid=0x356e waiting on condition [0x00007f4e6d49a000]
   java.lang.Thread.State: TIMED_WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x00000004e5684b00> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:196)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
	at java.util.concurrent.DelayQueue.poll(DelayQueue.java:201)
	at java.util.concurrent.DelayQueue.poll(DelayQueue.java:39)
	at org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:228)
	at java.lang.Thread.run(Thread.java:662)