"prabhat.jha(a)jboss.com" wrote : What I would like to mention though that the cluster name, mcast_addr, port parameters are different in jboss-service.xml in web-cluster.sar and portal.sar. Do they need to use same cluster config? No, they have to be diffferent. The different caches use different JGroups channels and those settings keep those channels' traffic separate. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4169151#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...