Jboss server (VM) occasional have a CPU spike at 100%. It is used for SSO. What does the attached java error mean?

We have a VM where the CPU occasionally spikes to 100%. It is a Jboss server and is used for business (background checks through our website). I belive it is also used for Single Sign on. When the CPU spikes at 100%, our customers complain that they cannot login, and get some timestamp error. In looking at jboss logs (attached), this may explain what may have caused the high CPU spike in the system. I see this same log each time the CPU spikes to 100%, however, I am not familiar with Jboss or Apache enough to suggest any fix for it. I’ve brought it up to the attention of our programmer/developer, but all they can say is they will take a look at it. However, they have not came up with any fixes, and I’m left with occasionally troubleshooting this problem. I would always have to stop/start the Jboss service to fix it. I’m a Windows guy. In looking at Windows log, it would not indicate anything on the OS side that would cause this spike. In looking at it from a Windows OS perspective, I noticed that this server has not been patched since 7/9/12. Not saying that patching will resolve the issue but it’s worth a shot. I just want to be able to justify why I think patching will help in some way. Has anyone ever encounter this problem, or know anything about the error message that will help alleviate this matter?

OS: W2K8 R2
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