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Reid Chan commented on HBASE-19822: ----------------------------------- {{LogCleaner}} may have the same problem, what about providing an addendum? > 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 > > > 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) -- This message was sent by Atlassian JIRA (v7.6.3#76005)