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Zookeeper, mail # user - ZooKeeper Clients waiting forever (hanging threads)


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Gunnar Wagenknecht 2011-06-21, 07:14
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Gunnar Wagenknecht 2011-06-21, 07:28
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Re: ZooKeeper Clients waiting forever (hanging threads)
Gunnar Wagenknecht 2011-06-21, 07:32
Am 21.06.2011 09:14, schrieb Gunnar Wagenknecht:
> I was wondering if this may have caused any race condition in the ZK client?

Oddly enough, the OOM might have killed the SendThread, i.e. in the JVM
thread dump there is no SendThread any more. Just the EventThread.

"ZooKeeper Gate Connect Thread-EventThread" daemon prio=10
tid=0x000000005a37d800 nid=0x4e03 waiting on condition [0x000000004357f000]
java.lang.Thread.State: WAITING (parking)
 at sun.misc.Unsafe.park(Native Method)
 - parking to wait for  <0x00002aaab158f1d8> (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:1987)
 at
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
 at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)

-Gunnar
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Gunnar Wagenknecht
[EMAIL PROTECTED]
http://wagenknecht.org/
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Gunnar Wagenknecht 2011-06-21, 09:27