[Looking for Charlie's main web site?]

Better understanding the IIS HTTPERR logs

Note: This blog post is from 2008. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
If you run IIS, are you familiar with its HTTPERR logs? If not, you may be missing out on some useful diagnostic information. Sadly, many (sometimes most) of the entries in the logs are innocuous (you don't need to worry about them), but sometimes they're useful. And if have noticed the logs, perhaps you'd like to know more about them.

There's a useful MS document, Error logging in HTTP API, with more about the HTTPERR logs, including their location, format, and info on the kinds of errors reported within them. Hope that's helpful to my readers.

Here's another (more brief) introduction to the files: in the technical reference section of the IIS 6 docs.

For more content like this from Charlie Arehart: Need more help with problems?
  • If you may prefer direct help, rather than digging around here/elsewhere or via comments, he can help via his online consulting services
  • See that page for more on how he can help a) over the web, safely and securely, b) usually very quickly, c) teaching you along the way, and d) with satisfaction guaranteed
Definitely handy. Especially when you get a NPP memory leak from bad antivirus software updates and start getting XX_CONNECTIONS_REFUSED everywhere in the log... never would have figured out the problem if I hadn't checked httperr.
# Posted By jc | 10/27/08 1:41 PM
Copyright ©2020 Charlie Arehart
Carehart Logo
BlogCFC was created by Raymond Camden. This blog is running version 5.005.
(Want to validate the html in this page?)

Managed Hosting Services provided by
Managed Dedicated Hosting