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

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
>

Hi César,

Thank you for the info! I'll give it a try.

--Michi

On Sun, Jul 29, 2012 at 4:22 AM, César Álvarez Núñez
<[EMAIL PROTECTED]> wrote:
> Hi Michi,
>
> The following patch 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
>
>