Unregistering MBeans

[washeeq]

Hello,
I am running TreeCache on WebSphere 6.0 and I've experienced following error:

javax.management.InstanceAlreadyExistsException: jboss.cache:service=TreeCache-Cluster

It happens when restarting enterprise application.

The cause is quite obvious, when TreeCache is created (in _createService() method) it is registered as a MBean to first found MBean Server (along with its interceptors). But no unregistration occurs neither in stopService nor in destroyService (there is no unregistering code in MBeanConfigurator utility class). Sounds like a bug for me...Is there any way how to unregister those MBeans?

InstanceAlreadyExistsException is not critical, but is quite bothering in log files.

BTW why there are

<depends>jboss:service=Naming</depends>
<depends>jboss:service=TransactionManager</depends>

entries in configuration?

Thank you,
Washeeq

[brian.stansberry]

Thanks for pointing this out. I've opened a JIRA; this will be fixed for 1.3.0.GA. See http://jira.jboss.com/jira/browse/JBCACHE-523.

For a workaround, add

<attribute name="UseInterceptorMbeans">false</attribute>

to your config file. That will prevent registration of the MBeans (at the cost of them not being visible via JMX).

Re: the depends elements, these are needed for most use cases of JBossCache inside the JBoss application server. Running outside of JBoss AS they do nothing.

[jerrygauth]

This has been fixed in JBossCache 1.3.0 GA release. See JBCACHE-523 for further details.