[jboss-jira] [JBoss JIRA] Created: (JBCACHE-1025) JBossCache mbean registration fails on WebSphere 6.1

Tue Apr 17 08:19:30 EDT 2007

JBossCache mbean registration fails on WebSphere 6.1
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                 Key: JBCACHE-1025
                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1025
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 1.4.1.SP3, 1.4.1.SP2, 1.4.1.SP1
         Environment: WebSphere 6.1
            Reporter: Jerry Gauthier
         Assigned To: Jerry Gauthier
             Fix For: 1.4.1.SP4

At least two customers have encountered the following problem when starting JBossCache on WebSphere 6.1.

When the cache is started and the cache's interceptor mbeans are registered, the registration fails with an InstanceAlreadyExistsException. This occurs even on initial startup and despite the fact that JBossCache only registers a name if it's not already registered.

A post to the ActiveMQ Forum at http://issues.apache.org/activemq/browse/SM-883 suggest that this problem occurs because WebSphere modifies the mbean's registration name during the registration process.  Subsequent tests to determine if the mbean has been registered apparently fail unless the client uses the name generated by WebSphere.  (This is unverified but seems plausible.)

Caused by: javax.management.InstanceAlreadyExistsException:jboss.cache:service=TreeCache-Group,cell=citgoNode01Cell,nod
e=citgoNode01,process=server1

at com.sun.jmx.mbeanserver.RepositorySupport.addMBean(RepositorySupport.java:452)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1410)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:936)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:337)
at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:497)
at com.ibm.ws.management.PlatformMBeanServer.registerMBean(PlatformMBeanServer.java:469)
at org.jboss.cache.util.MBeanConfigurator.registerInterceptors(MBeanConfigurator.java:72)
at org.jboss.cache.TreeCache._createService(TreeCache.java:1428)
at org.jboss.cache.TreeCache.createService(TreeCache.java:1378)
at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260)
at org.jboss.system.ServiceMBeanSupport.create(ServiceMBeanSupport.java:188)

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