title: An error occurred while processing your request
body: <p>Some users experience difficulty logging into our web site and got the following error message.</p>
  
  <p>An error occurred while processing your request.
  Reference #97.64bcf648.1412893809.36fcbfb4</p>
  
  <p>They said that they could sometimes log　in but sometimes couldn't do.</p>
  
  <p>I and my co-workers tried to do it a lots, but We didn't get any errors.
  The users said that they removed all of cookies and caches.</p>
  
  <p>We are using apache, tomcat, struts2, akamai(CDN),big-ip.</p>
  
  <p>What's happening with our web site?</p>