Is that all that changed? Is it possible that the default thread stack size was changed as well?
Actually these 2 are the only kernel parameters that have been modified , I do not know if they might have impact on the thread stack size or not.
Do you think it is worth to change the thread stack size using the option -Xss?
Is it possible to be done during the JBoss start up?
Thanks for your quick reply.
I'd be surprised if those kernel parameters had any impact on the stack size.
Do you have a backup of the previous sysctl.conf file? What happens if you rollback to the old one? Have you compared the old with the new?
What is the output of sysctl -a?
You could try adding the -Xss option in the bin/run.conf file to the line that sets up JAVA_OPTS, but that does not seem like the root cause. Normally we use that to reduce the default stack size, which can be pretty big (2M on Linux).
When rolling back these parameters the JBoss worked fine without any problems, i.e when the backup was restored the problem was solved.
I will get back to with these output of sysctl -a when i get it from the system admin.
Thanks again for your help.