The "error" you posted is a summary report of deployments that failed. The actual reason for why the deployment failed is in a stack trace earlier in the console output. Please post that stack trace. By the way, you do not need the "hibernate.connection.*" parameters in persistence.xml. You only need those if Hibernate will directly open the database, but you are going through the MySqlDS data source that you set up, and that data source already contains that information. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4144666#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...