JBoss runs a number of helper processes to do things like clean up of idle connections, creation of new connections for the connection pool and so on. It is a application server microkernel and like the Linux OS, has some background tasks always running.
With the number of threads you have related to the JBoss JVM, it sounds like some problem in the deployed applications or a misconfiguration.
Have you made any changes to the JBoss configuration and are there any applications deployed? Please detail the changes as it might be easier to identify the problem. Please detail the crash events. Also provide information on the memory you have available.
Thanks for your reply
After some further investigation, this problem occurs after the deployment of a custom MBEAN that gets activated every minute (TimeNotifier)
I assume I don't close a connection or something else doesn't get properly removed after use and causing threads to accumulate ...
I'll keep looking for this