correct, as long as it ends with -ds.xml Also make sure to not deploy 2 datasources with the same name View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4240249#4240249 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4240249