Why Application server (Jboss) utilization is very High?

Verify the number of "Max Threads" in server.xml file(deploy/Jboss-web-deployer/server.xml). If this value is not accurate then , it creates more threads, then CPU utilization increases.

Rule of thumb for "Max Threads" = 250*no. of processors

= 250 *2 (2 core system)

= 500

Now change the value in your server.xml , shown below