Answered my own question. I installed jdk1.5.0_13 and now jboss starts up. Thanks! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103375#4103375 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4103375