You need JDK 1.5 to build JBossAS 4.2.2 (you have JDK 1.4) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4140208#4140208 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4140208