You say you made it cluster aware. Is there actually a cluster involved? Your config shows it binding to localhost, so any cluster would have to be made up of nodes running on the same machine. Also what JGroups release is on the classpath? You can test by executing java -cp jgroups.jar;commons-logging.jar org.jgroups.Version from the dir where the jars are. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993873#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...