User development, A new message was posted in the thread "Migrate from Jboss 4.2.3 to Jboss 5.1.0 ==> lookup("java:comp/env") threw exception": http://community.jboss.org/message/529516#529516 Author : hua lin Profile : http://community.jboss.org/people/fjlinhua Message: -------------------------------------------------------------- you must used:   ic = new InitialContext();       ds = (DataSource)ic.lookup( "java:/xxxxx" );   con = ds.getConnection(); to get datasource. -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/529516#529516