tcp stack still uses MPING, multicast based member discovery, to find other members in the cluster, so maybe the cluster did not form correctly, which would explain why invalidation does not happen. Check for view messages for the MVCCEntityCache cache instance in the logs. See if the view messages contain the two members in the cluster View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4237867#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...