I'm still getting the same error. | Error:org.hibernate.HibernateException: Could not find datasource: java:MySqlDS | Error Detail: javax.persistence.PersistenceException: org.hibernate.HibernateException: Could not find datasource: java:MySqlDS | I've also tried to enumerate the jndi naming list, to my surprise I get MySqlDS(org.jboss.resource.adapter.jdbc.WrapperDataSource) when I list out "java:" namespace, but when I try to get "java:MySqlDS" it just return null. Is this a bug in JBOSS 4.2.2? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4159452#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...