title: Why my Django server not work suddenly?
body: <p>I am woking on Ubuntu 12, python2.6 and Django1.2.x which is my test server.
  And I run a Django project on my test server using below command:</p>
  
  <pre><code>python manage.py runserver 0.0.0.0:8000
  </code></pre>
  
  <p>The server can work for most time(I let it run on 7X24 for other teammate to access it), but sometime it would suddenly not work:</p>
  
  <ul>
  <li>Browser shows me that "server not available" when I try to access it.
  And of course, the test server cannot get any request from my frontend, and no error throws on server side.</li>
  </ul>
  
  <p>All will back to OK once I using  my django project and run it again.</p>
  
  <p>now I have 2 question:</p>
  
  <ol>
  <li>Why does this issue happend?</li>
  <li>How can I develop a shell script to detect this situation?</li>
  </ol>