Got in on a Monday morning ready to write some code. Start up the JBoss server via JBoss tools, but it just freezes after a while. Works perfectly with debug arguments. So I started the server via the bin/debug.sh command and connected Eclipse to the JBoss server. As soon as I connected to the server it froze and when I disconnected everything went back to normal...
Debug breakpoint in a EJB causes a heavy overhead to JBoss startup. And that is exactly what I did had a breakpoint left in from the previous week. So remove all breakpoints when you have finished debugging!