Then there is most likely another jboss instance running. Get a tool for your platform that shows the port/process bindings to see what has the conflicting ports in use.
Thanks for your reply. I did try netstat -a, could not see that port in use. First time when I start JBoss I don't get address bind error for port 4444. It happens only after I press ctrl+c on console to shutdown and then choose to run.