Well, I was getting noclassdeffound errors. The problem was that the the jboss-app for the 2 ears had a different entry in the <jboss-app><loader-repository></loader-repository></jboss-app> tag. By making those 2 entries identical, the classes loaded from the original ear were available to the other ear. Now, the problem I'm facing is that the Entity bean I wanted to share is persisting to Ear1's defined datasource instead of Ear2's datasource. I imagine this is because when jboss starts up, it does some maping for entity beans so it can quickly write to the DB. I'm not sure if I am going to be able to find a way to make it treat the Entity bean differently depending on which application is calling it. I may have to write some persistence code in Ear2 to make sure that it is writing the way I want it to, instead of just using EntityManager's persist method. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4155175#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...