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https://issues.apache.org/jira/browse/HBASE-10563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13903825#comment-13903825
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Himanshu Vashishtha commented on HBASE-10563:
---------------------------------------------
With this patch, the stack trace for FlushHandler looks like:
{code}
"MemStoreFlusher.0" prio=10 tid=0x00007f65c862b000 nid=0x20f4 waiting on
condition [0x00007f65c7af9000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000000f6939a38> (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.poll(DelayQueue.java:201)
at java.util.concurrent.DelayQueue.poll(DelayQueue.java:39)
at
org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:252)
at java.lang.Thread.run(Thread.java:662)
{code}
The naming is consistent with the other threads (syncers in FSHLog).
mvn test -Dtest=Test*MemStore* passes.
> Set name for FlushHandler thread
> --------------------------------
>
> Key: HBASE-10563
> URL: https://issues.apache.org/jira/browse/HBASE-10563
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.98.0
> Reporter: Himanshu Vashishtha
> Attachments: 10563-v1.patch
>
>
> The FlushHandler thread in MemStoreFlusher class uses default thread name
> (Thread -XX). This is un-intentional and also confusing in case when there
> are multiple handlers.
> Current Stack trace looks like this:
> {code}
> "Thread-18" prio=10 tid=0x00007f4e8cb21800 nid=0x356e waiting on condition
> [0x00007f4e6d49a000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000004e5684b00> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$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)
> {code}
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