I'm getting the same thing on RHLinux (Kernel 2.4) and JBoss 4.0.2. I've no clue yet what's going on. What platform are you on?
I'm running on Windows 2000 sp4. I was finally able to work past the problem, but I'm still not entirely sure what was causing it. I stopped using the ports-01 and ports-02 configurations and went with the ports-02 and ports-03. When I changed the configurations, there was no error. I haven't had time to go back and look at exactly what was going on, but I will try and take time to do this and get back with you.