title: openfire service stop automatically in ubuntu 14.04
body: <p>My XMPP service stopped automatically. it happens every 2 or 3 days. I have to restart service manually what could be the issue? it really a big issue and my application is live. </p>
  
  <p>Error log:</p>
  
  <blockquote>
    <p>at
    org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)</p>
    
    <p>at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)</p>
    
    <p>at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)</p>
    
    <p>at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)</p>
    
    <p>at java.lang.Thread.run(Thread.java:745) 
        2016.01.31 06:30:47 org.jivesoftware.openfire.plugin.rest.exceptions.RESTExceptionMapper -
    UserNotFoundException: Could not get user with ressource 173 
        2016.01.31 06:35:26 org.jivesoftware.openfire.plugin.rest.exceptions.RESTExceptionMapper -
    UserNotFoundException: Could not get user with ressource 162</p>
  </blockquote>