Re: [jgroups-dev] Hang at org/javagroups/JChannel.connect(JChannel.java:257)

Yes, JGroups 2.1.0 is indeed ancient (8 years old). Doesn't OSCache 
provide a more recent version ? Looks like OSCache itself is not 
maintained anymore, the latest version is from 2007 (?)

I suggest trying to upgrade JGroups to a newer version (if 2.11 doesn't 
work, try at least 2.6.18...). Then ping the OSCache folks to see if 
they can help you (I'm not involved with OSCache).


On 2/18/11 7:29 AM, Florin Pop wrote:
> Hi gurus,
>
> I have a legacy application deployed in a cluster and in certain cases
> when a node in the cluster fails it is not able to rejoin the cluster.
> It seems to be hanged with a stack like this:
>
> "[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default
> (self-tuning)'" id=14 idx=0x40 tid=21992 prio=5 alive, in native,
> waiting, daemon
> -- Waiting for notification on: java/lang/Object@0x2aaabb4dd010[fat lock]
> at jrockit/vm/Threads.waitForNotifySignal(JLjava/lang/Object;)Z(Native
> Method)
> at java/lang/Object.wait(J)V(Native Method)
> at java/lang/Object.wait(Object.java:485)
> at org/javagroups/JChannel.connect(JChannel.java:257)
> ^-- Lock released while waiting: java/lang/Object@0x2aaabb4dd010[fat lock]
> ^-- Holding lock: org/javagroups/JChannel@0x2aaabb4d60f8[biased lock]
> at org/javagroups/blocks/NotificationBus.start(NotificationBus.java:116)
> at
> com/opensymphony/oscache/plugins/clustersupport/JavaGroupsBroadcastingListener.initialize(JavaGroupsBroadcastingListener.java:96)
>
> ^-- Holding lock:
> com/opensymphony/oscache/plugins/clustersupport/JavaGroupsBroadcastingListener@0x2aaabb4cf3f8[biased
> lock]
> at
> com/opensymphony/oscache/base/AbstractCacheAdministrator.configureStandardListeners(AbstractCacheAdministrator.java:299)
>
> at
> com/opensymphony/oscache/general/GeneralCacheAdministrator.createCache(GeneralCacheAdministrator.java:297)
>
> at
> com/opensymphony/oscache/general/GeneralCacheAdministrator.<init>(GeneralCacheAdministrator.java:99)
>
>
> The application is using an acient Javagroups version:
> fpop@logan:~$ java -cp javagroups-all.jar org.javagroups.Version
>
> Version: 2.1.0
> CVS: $Id: Version.java,v 1.21 2003/06/30 16:53:05 belaban Exp $
> History: (see doc/history.txt for details)
>
> Was wondering if this a known issue for this version and if this was
> addressed in the newer releases. Otherwise if you can suggest how can I
> determine the cause of this hang. In all cases bouncing the whole
> cluster is the ultimate solution and it works every time without any
> changes in the multicast addresses / network configuration.
>
> Thanks in advance,
> Florin P®P
> Bucharest, Romania

-- 
Bela Ban
Lead JGroups / Clustering Team
JBoss

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