Noam, I suspect that the tomcat doesn't hangs but rather you reach the max TCP connection that your server accepts. The best will be to write a small program you run by calling a servlet which write to the output "I'm a live" every 10 min. Run the program after you restart the server and wait till your problem occurs, then if you see that the output string keep coming then the tomcat isn't dead just your server rejects tcp connection.
I think it could be a good idea to include that kind of servlet as part of the manager webapp.
Even if we manage to isolate and fix that bug, it won't solve all the other possible stability issues (VM crash, OOM), so admins could find this useful.
-- xxxxxxxxxxxxxxxxxxxxxxxxxxxxx Re'my Maucherat Senior Developer & Consultant JBoss Group (Europe) Sa`RL xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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