title: Mod cluster proxy timeout in apache error logs
body: <p>In our environment we get these entries consistently in error logs.</p>
  
  <pre><code>[Sun Dec 22 20:29:43 2013] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header
  [Sun Dec 22 20:29:43 2013] [error] ajp_read_header: ajp_ilink_receive failed
  [Sun Dec 22 20:29:43 2013] [error] (70007)The timeout specified has expired: proxy: read response failed from (null) (xx.xx.xx.xx)
  [Sun Dec 22 20:30:01 2013] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header
  </code></pre>
  
  <p>If these errors appear from all nodes at once the site will be throwing a 998 response code until a restart which makes these errors disappear.
  Apache is communicating to Back end jboss servers.</p>
  
  <p>What might be causing these issues. Based on my observation it might due to delay in webservice calls causing termination of AJP connection.</p>
  
  <p>Please correct me if I am wrong and how can this issue be fixed permanently.</p>
  
  <p>Thanks.</p>