So no one has any ideas? I'm really stumped here. I've started from scratch and did the most basic thing and verified the same jboss files and same cluster jar files (just a copy of the "all" server). Except for adding my very small web app and config file listed above for the cache, it is just a straight jboss. I still the get the same exception. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247938#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...