You will have to map the resource ref with the jndi name of your datasource. Here's the jboss-web.xml file that you will have to create(if its not already there in your JPetStore's WEB-INF folder): | <?xml version="1.0" encoding="UTF-8"?> | <!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.2//EN" "http://www.jboss.org/j2ee/dtd/jboss-web.dtd"> | | <jboss-web> | | <resource-ref> | <res-ref-name>jdbc/jpetstore1</res-ref-name> | <jndi-name>java:/jpetstore1</jndi-name> | </resource-ref> | | | </jboss-web> Place this jboss-web.xml in the WEB-INF folder of your jpetstore.war file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983294#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...