Are any errors showing up in the server log?
I can't see any errors in the log,
The Jboss was processing the things for the others applications ( just the automatic ones) but the web part seemed to hang .. just opened the hibernate app web page, and the other ones didn't get response...
and i had to close Jboss the hard way cuz it just wouldn't close but hitting ctlr + c
What is the processor utilization? If it is higher than expected, then there could be a loop. To find it, take some thread dumps to see what is running (usually 2 or 3 thread dumps spaces a few seconds apart should do it).