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Zookeeper, mail # user - ZooKeeper 3.4.3: Failed to unregister with JMX


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Re: ZooKeeper 3.4.3: Failed to unregister with JMX
César Álvarez Núñez 2012-07-29, 11:22
Hi Michi,

The following patch
ZOOKEEPER-1214<https://issues.apache.org/jira/browse/ZOOKEEPER-1214>is
needed in order to restart a QuorumPeer when running in embedded mode.

Could you try it again with ZK-1214 applied?

BR,
/César.

On Fri, Jul 27, 2012 at 10:44 PM, Michi Mutsuzaki <[EMAIL PROTECTED]>wrote:

> Hi,
>
> I'm using 3.4.3 in "embedded" mode (i.e. zookeeper is sharing jvm with
> some other app). I got this warning when I called
> QuorumPeer.shutdown().
>
> 2012-07-25 16:11:55,003 142220 [QuorumPeer[myid=0]/127.0.0.1:2900]
> WARN org.apache.zookeeper.server.ZooKeeperServer  - Failed to
> unregister with JMX
> java.lang.IllegalMonitorStateException
>         at
> java.util.concurrent.locks.ReentrantReadWriteLock$Sync.tryReleaseShared(ReentrantReadWriteLock.java:398)
>         at
> java.util.concurrent.locks.AbstractQueuedSynchronizer.releaseShared(AbstractQueuedSynchronizer.java:1340)
>         at
> java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.unlock(ReentrantReadWriteLock.java:778)
>         at com.sun.jmx.mbeanserver.Repository.retrieve(Repository.java:522)
>         at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1111)
>         at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.exclusiveUnregisterMBean(DefaultMBeanServerInterceptor.java:433)
>         at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.unregisterMBean(DefaultMBeanServerInterceptor.java:421)
>         at
> com.sun.jmx.mbeanserver.JmxMBeanServer.unregisterMBean(JmxMBeanServer.java:540)
>         at
> org.apache.zookeeper.jmx.MBeanRegistry.unregister(MBeanRegistry.java:115)
>         at
> org.apache.zookeeper.jmx.MBeanRegistry.unregister(MBeanRegistry.java:132)
>         at
> org.apache.zookeeper.server.quorum.LearnerZooKeeperServer.unregisterJMX(LearnerZooKeeperServer.java:138)
>         at
> org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:100)
>         at
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:740)
>
> Has anybody seen a trace like this before? It looks like
> ReentrantReadWriteLock.ReadLock.unlock() failed, but I wasn't sure
> why...
>
> Thanks!
> --Michi
>