title: Windows Azure cloud service IIS sometimes returns 503 error
body: <p>I'm developing node.js application for Azure Cloud services. Everything works great, BUT sometimes my application returns 503 error, when deployed on Azure, with no particular reason. I connected to the role VM via Remote Desktop, and found the following error in events list, corresponding to the time of the 503 code return:</p>
  
  <blockquote>
    <p>A process serving application pool '6cd02903-1cba-4667-9d0b-20883ad3f0de' terminated unexpectedly. The process id was '2284'. The process exit code was '0xfffffffe'.</p>
  </blockquote>
  
  <p>I tried to Google that error message, and it seems like IIS misconfiguration usually causes the problem, but it seems to be persistent in that case, not just sometimes like in my experience. Also I don't feel confident in changing IIS configuration on ready-made web roles servers provided by Azure. I've got feelings it has something to do with node, more probably iis-node issue. </p>
  
  <p>Any help in debugging the problem will be greatly appreciated.</p>