Ralph Soika [http://community.jboss.org/people/rsoika] replied to the discussion "unable to setup mysql database on JBoss 5.1.0GA" To view the discussion, visit: http://community.jboss.org/message/549804#549804 -------------------------------------------------------------- Thanks for your reply. I found out the the database connection is ok and it is working as defined. My fault was that I defined in my pesistence.xml the jta-data-source with <jta-data-source>jdbc/workflow-db</jta-data-source> but the prafix "java:/" is necessary for jboss (?). After I changed the jta-data-source tag to: <jta-data-source>java:/jdbc/workflow-db</jta-data-source> the application works well and all tables in my database were generated correctly. This is confusing because on a Glassfish Server the jta-data-source is always declared without the prafix "java:/" . So it seems to me that the persistence.xml configuration is depending on the app-server platform :-/ -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/549804#549804] Start a new discussion in Datasource Configuration at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]