MBeanConfigurator is registering the cache's mbean using the object name that it retrieves as you noted. By default (e.g., no config file, no cluster), this name will be "jboss.cache:service=TreeCache-Group." If you retrieve the name of the registered object instance after registration, the returned name (on my server) is "jboss.cache:service=TreeCache-Group,cell=citgoNode01Cell,node=citgoNode01,process=server1" WebSphere appends the cell name, node name and server name to the object's registration name. It seems likely that you subsequently need to use this name if you want to determine whether an mbean has already been registered. The same issue applies to registration of the individual interceptors. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4038127#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...