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From John Lindwall <jlindw...@yahoo.com.INVALID>
Subject Thread dump looks OK?
Date Sat, 24 Oct 2015 01:04:21 GMT
We use zookeeper 3.4.6

Our webapp running in a tomcat server suffered a condition where user 
sessions seemed to "freeze". We got a single thread dump at that time. I 
am curious about a particular stacktrace that is seen in the thread 
dump, related to zookeeper.

Does the following stacktrace cause any alarm or concern?  Thanks!

"ajp-bio-8012-exec-561-EventThread" daemon prio=3 tid=0x0000000105a46000 
nid=0x11fa waiting on condition [0xfffffffd967ff000]

    java.lang.Thread.State: WAITING (parking)

                 at sun.misc.Unsafe.park(Native Method)

- parking to wait for <0xffffffff11fd9110> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)

                 at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)

                 at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)

                 at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)

                 at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:494)

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