Okay i now get some idea about what you are trying to do :-) Going back to my earlier reply, did you configure the MDB to be a singleton as explained in the wiki? I would recommend that you try this first on a non-clustered setup and get the singleton MDB and your entity updates working. If it does not work even on a non-clustered setup, you might be having some other issues in the application. Let us know how it goes on a non-clustered setup. If it works on this setup then we can see why it does not work on a clustered setup. I assume you have read the "This doesn't work in a cluster?" section in that wiki, which explains what has to be done on a clustered setup. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4189338#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...