title: Struts2 performance issue
body: <p>I am using Struts2 in my application .it's working fine when there is less number of users.
  But in real time there are around 3000 requests hiting to the application.And after some time my JVM get crashed.I checked the thread dump it seems to be lot of thread blocked while executing the OGNL expression.</p>
  
  <p>And the CPu utilization is always around 130% in the pick times.Please suggest me what will be the best approach to run stuts2 application in highly scalable enviroment.</p>