The jboss.cache:service=InvalidationBridge,type=JavaGroups service provides cluster-wide invalidation of EJB2 entity bean caches. If you're not using EJB2 entity beans you don't need this service and can comment out or remove the mbean at the bottom of the deploy/cluster-service.xml file. The problem is occuring because the jboss.cache:service=InvalidationManager service is not present. That's deployed in the deploy/cache-invalidation-service.xml file. Perhaps you removed this file because you weren't using EJB2 entities? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077933#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...