You don't need to replace the hqldb-sa.xml. You can create an oracle data source, give it a unique name and let your application refer to the new data source. JBoss has examples of oracle data sources at ${JBOSS_HOME}/docs/examples/jca you only need to copy it to the deploy folder and reconfigure to match your settings If you're doing out-of-container testing you probably only need to reconfigure your persistence.xml to point directly at your database. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109457#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...