have a look at this: http://docs.jboss.com/jbossas/guides/clusteringguide/r2/en/html_single/ in the process of setting up clustering you will also enable HA-JNDI. when starting a jboss instance you can use the -g flag to specify a cluster group name. JNDI lookups are slightly different too, HA-JNDI uses port 1100 by default. If you are passing properties to a lookup context you will also have the option of using the cluster group name instead of an IP/port. hope that helps View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100225#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...