anonymous wrote : Another question: How do I change to mysql instead of hsqldb? Do I have to unjar mc-conf.jar, edit embedded-jboss-beans.xml, then reJAR the JAR file and restart the application? All you should have to do is to setup the mysql data source in a new xml file in the deploy directory. You can either create a new JNDI data source (MySQLDS) if you want to use it for new code, or replace the existing DefaultDS with a mysql based definition. See the file in my reply above for more info. You shouldn't need to unjar things. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3989025#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...