title: dev_appengine cannot open a simple Hello World application
body: <p>Suddenly after a system reboot, the dev_appengine stopped working properly.</p>
  
  <p>Any access attempt to the application ends with an error, the admin server is working fine though.</p>
  
  <p>I've also tried with a simple Hello World application but had no luck.</p>
  
  <p>The error is <a href="http://pastebin.com/M1Xukjd2" rel="nofollow">here</a> and the sample app is <a href="http://pastebin.com/b8RyjmBB" rel="nofollow">here</a>.</p>
  
  <p>Best regards</p>