java:comp/env namespace has a special meaning. Why are you setting the JNDI in the datasource to this format? Why not set the jndi-name in the -ds.xml to: <jndi-name>jdbc/juddiDB</jndi-name> Then you can lookup using: initCtx.lookup("java:jdbc/juddiDB"); If you want the datasource to be available in the java:comp/env namespace then it requires a different set of steps. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269926#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...