Common problems with JBoss
From Oxxus Wiki
Inspecting the most recent log file will give clues as to what went wrong.
After changing JBoss configuration files and deploying new applications, always check the logs to see if there are any errors or exceptions raised.
Most common problem from our experience is the lack of memory. Ensure you have set up the proper heap size for your application needs, you can find more about this on one of the previous pages.
Should you experience any other issues with JBoss, submit a ticket to our support team, to help you resolve it.