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https://issues.apache.org/jira/browse/HBASE-3622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13011482#comment-13011482
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Hudson commented on HBASE-3622:
-------------------------------
Integrated in HBase-TRUNK #1814 (See
[https://hudson.apache.org/hudson/job/HBase-TRUNK/1814/])
> Deadlock in HBaseServer (JVM bug?)
> ----------------------------------
>
> Key: HBASE-3622
> URL: https://issues.apache.org/jira/browse/HBASE-3622
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.1
> Reporter: Jean-Daniel Cryans
> Priority: Critical
> Fix For: 0.92.0
>
> Attachments: HBASE-3622.patch
>
>
> On Dmitriy's cluster:
> {code}
> "IPC Reader 0 on port 60020" prio=10 tid=0x00002aacb4a82800 nid=0x3a72
> waiting on condition [0x00000000429ba000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00002aaabf5fa6d0> (a
> java.util.concurrent.locks.ReentrantLock$NonfairSync)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
> at
> java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
> at
> java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
> at
> java.util.concurrent.LinkedBlockingQueue.signalNotEmpty(LinkedBlockingQueue.java:103)
> at
> java.util.concurrent.LinkedBlockingQueue.put(LinkedBlockingQueue.java:267)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Connection.processData(HBaseServer.java:985)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:946)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:522)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:316)
> - locked <0x00002aaabf580fb0> (a
> org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> ...
> "IPC Server handler 29 on 60020" daemon prio=10 tid=0x00002aacbc163800
> nid=0x3acc waiting on condition [0x00000000462f3000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00002aaabf5e3800> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
> at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1025)
> "IPC Server handler 28 on 60020" daemon prio=10 tid=0x00002aacbc161800
> nid=0x3acb waiting on condition [0x00000000461f2000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00002aaabf5e3800> (a
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
> at
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
> at
> java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1025
> ...
> {code}
> This region server stayed in this state for hours. The reader is waiting to
> put and the handlers are waiting to take, and they wait on different lock
> ids. It reminds me of the UseMembar thing about the JVM sometime missing to
> notify waiters. In any case, that RS needed to be closed in order to get out
> of that state.
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