<property name="hibernate.connection.datasource" value="java:MySqlDS" /> | <property name="hibernate.jndi.url" value="jnp://localhost:1099" /> | <property name="hibernate.jndi.class" value="org.jnp.interfaces.NamingContextFactory" /> Try removing these entries from the persistence.xml. I also see that you are using a non-jta-datasource and persitence type RESOURCE_LOCAL. For container managed entity manager, this should have been a jta-datasource and the (default) persistence type JTA View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4159440#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...