title: Tomcat stopped without any log or any stack
body: <p>We have trouble with Tomcat 5.5 which stops at night on our production servers (Linux CentOS 4.8) and we have no idea why it stops...
  There is no Tomcat's log in catalina.out or any application's log.</p>
  
  <p>We tried different things to find why the server stops:</p>
  
  <ul>
  <li>configure Tomcat to be able to generate a core dump</li>
  <li>instrument <code>System.exit()</code> method with javassist to find if the method was called</li>
  <li>add a shutdown hook to the JVM (with <code>Runtime.getRuntime().addShutdownHook()</code>)</li>
  </ul>
  
  <p>None of them worked, we have no core dump, the Exit method and the shutdown hook are not called.
  My conclusions are:</p>
  
  <ul>
  <li>The VM is not terminated properly but crash without any log.</li>
  </ul>
  
  <p>Any idea or log to read to find why Tomcat stops?</p>