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https://issues.apache.org/jira/browse/HBASE-19822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16332823#comment-16332823
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stack commented on HBASE-19822:
-------------------------------
I don't see it in thread dumps or left over in test runs but pushed this
anyways... Thanks [~reidchan]
> HFileCleaner threads stick around after shutdown stuck on queue#take
> --------------------------------------------------------------------
>
> Key: HBASE-19822
> URL: https://issues.apache.org/jira/browse/HBASE-19822
> Project: HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Priority: Major
> Fix For: 2.0.0-beta-2
>
> Attachments: HBASE-19822.master.001.patch,
> HBASE-19822.master.addendum.patch
>
>
> In thread dumps and in unit tests I see a lot of this:
> Potentially hanging thread:
> M:0;asf903:36485-HFileCleaner.large.0-1516277241553
> sun.misc.Unsafe.park(Native Method)
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> org.apache.hadoop.hbase.util.StealJobQueue.take(StealJobQueue.java:106)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner.consumerLoop(HFileCleaner.java:232)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner$1.run(HFileCleaner.java:201)
> Potentially hanging thread:
> M:1;asf903:38770-HFileCleaner.large.0-1516277250526
> sun.misc.Unsafe.park(Native Method)
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> org.apache.hadoop.hbase.util.StealJobQueue.take(StealJobQueue.java:106)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner.consumerLoop(HFileCleaner.java:232)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner$1.run(HFileCleaner.java:201)
> Or long after a server has been killed in a unit test, I'll see this if a
> thread dump:
> Thread 1635 (M:0;asf903:36485-HFileCleaner.small.0-1516277241554):
> State: WAITING
> Blocked count: 0
> Waited count: 1
> Waiting on
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@626c1c7e
> Stack:
> sun.misc.Unsafe.park(Native Method)
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
>
> java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:549)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner.consumerLoop(HFileCleaner.java:232)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner$2.run(HFileCleaner.java:216)
> Thread 1634 (M:0;asf903:36485-HFileCleaner.large.0-1516277241553):
> State: WAITING
> Blocked count: 0
> Waited count: 2
> Waiting on
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@2f961ff0
> Stack:
> sun.misc.Unsafe.park(Native Method)
> java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
>
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
> org.apache.hadoop.hbase.util.StealJobQueue.take(StealJobQueue.java:106)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner.consumerLoop(HFileCleaner.java:232)
>
> org.apache.hadoop.hbase.master.cleaner.HFileCleaner$1.run(HFileCleaner.java:201)
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