title: Intermittent 503 Error caused by SQL Server & web.config file?
body: <p>Good morning, I've been fighting with this issue over the weekend, and have gotten several different stories from my hosting provider. The reason I'm asking here now is because they're now blaming me and my code for the issue. The issue is that all of the .com and .co domains on our hosting account are not accessible due to a 503 service unavailable error, and this appears to be intermittent, and varies across ISP's. Checking out the websites at <code>www.isitdownforeveryoneorjustme.com</code> when the site first goes down confirms that this isn't just my ISP. The domains in question are <code>www.mhn.co</code>, <code>hub.mhn.co</code>, <code>www.mrbarbershop.co</code>, and <code>www.adecor.co</code>, along with a handful of others.</p>
  
  <p>www.mhn.co and hub.mhn.co are both Asp.Net MVC2 Applications that I worked on, the other two sites are static html (as far as i know, they are not my projects). Where it begins to get weird is while I am getting the 503 Service Unavailable message from my ISP when accessing www.adecor.co, my boss is getting the yellow screen of death saying an exception has occurred and the stack trace points to the application running at hub.mhn.co, saying the column name "ImageUrl" is invalid. He hasn't been able to reproduce the message since, but took a screenshot when it first happened.</p>
  
  <p>At this point in time, I can access all of the websites from my iPhone through my cell network without issues. I have reset the application pool manually and still cannot access any of the sites above from my home ISP.</p>
  
  <p>Calling domainhut over the weekend has had various results. The first time we called and they said it was something on their end and they tinkered around and somehow got everything working again. The problem came back and persisted over the weekend, and when I called them this morning, they claimed to have no idea. When my boss called, they told him its due to a handler in my web.config file (I haven't changed anything in there for over 2 months) and that I should check my SQL Server for any issues. I'm stumped, am I being given the runaround, or is it really my fault?</p>
  
  <p><em>edit</em></p>
  
  <p>So, after looking into it a little more - www.adecor.co was pointing to the hosting root, where there was a duplicate views folder from hub.mhn.co and a default.aspx, probably from an upload mistake, but removing that clears the yellow screen. Could this have been the cause of the 503? Or is it only because of this error we've noticed the misplaced files in the root. It's been sitting there for a while (since august) and the 503 error has only been happening since Friday. </p>