I ran into the same problem and once I made sure the hostname was correct in both the HOSTNAME and network files, it worked fine. The error is being generated by a preRegister() function which calls a domain name validation check. So...either you need to have the hostname on a DNS server or the fully qualified host name has to be in your /etc/hosts file. This appears to be similar to the Apache Servername check done you start up Apache httpd, at least....that was the fix for me. Dave Baker Just another JBoss user View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116905#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...