Actually, it might be better to just implement a single XAResource and get each MDB deployment to add/remove() via the resource adapter rather than you trying to work out what changed in a list of XAResources. It could also do with some kind of | close(); | to say you've finished with the XAResource and reclaim the resources although that's currently an issue with the ResourceAdapter api. :-( View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133837#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...