Dunno about 5.0 but in 4.2.3 I had noticed that simply changing the name of the partition in clustering-service.xml was the wrong way to do this, as many other systems use the jboss.partition.name variable. So when I, instead of setting it in the clustering-service.xml, rather set JAVA_OPTS with -Djboss.partition.name=[whatever] everything worked again. HTH View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4222508#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...