Hi, I would advice to try it. It have to be possible, to change the old persistence.xml to the new persistence.xml. Since your ejb tries to connect to the database or uses an entity-manager, I think the persistence-context will be refreshed. It should be similar like patching new compiled java-classes. I hope it so. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4139653#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...