Troubleshooting Intermittent Failures on Web Applications (ASP.NET)

Got reports of a web app going down twice in three weeks. Need to do some root cause analysis. works fine after a reboot. I'm not really an expert in this field.

It is hosted on IIS and Windows 2003.

There is nothing interesting in the event viewer, and IIS logs just show lots of successful GET operations. There is nothing interesting in SQL logs on the remote SQL server it connects to.

I'm not sure how to decipher the IIS log. It just looks like a bunch of successful GET messages with no errors.

I don't think I can really get too much further with root cause analysis track down the cause of the issue?


The only thing you could try to get some real results is this excellent blog by Tess Ferrandez. I think that you will find crash lab very enlightening :)

Take a look at this, it might help you find the app shutdown cause.

Depending on your traffic, twice in three weeks doesn't sound like a lot. The root cause may relate to the fix- if you were able to bring it back up by restarting IIS, it could be a memory leak. If you had to restart the server, it could be a deeper problem.

Need Your Help

PHP 5.1.6 ArrayAccess error when iterating over object

php spl arrayaccess

I'm having to develop a site on PHP 5.1.6 and I've just come across a bug in my site which isn't happening on 5.2+. When using foreach() to iterate over an object, I get the following error: "Fatal...

Cross-origin image load from cross-enabled site is denied

javascript image html5-canvas dropbox cors

I'm trying to use CORS enabled image which is located on cors-enabled site: