Iis Web Server Error Codes
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that I am going to share now has helped me to troubleshoot a majority of cases I have had on IIS.Lets start by understanding what are status and sub states http://blogs.iis.net/ma_khan/troubleshooting-iis-6-status-and-substatus-codes codes.Everytime IIS receives a request, if IIS logging in enabled, IIS logs the request into a Log file. In IIS 6 logging in enabled by default however in IIS 7 it's a choice.To a http://www.dotnetnoob.com/2012/03/iis-500-errors-leave-clues-in-log.html beginner, the common questions that arise at this point are,Q.) How do we drill down to the logs of an appropriate website?A.) Here is how you do it.By default,In IIS 6 logs are stored at status code C:\windows\system32\LogFiles\In IIS 7 the location would be C:\inetpub\logs\logfiles\Once you get to this location you would be seeing entries like this W3SVC1, W3SVC87257621.Q.) What do these entries mean?A.) W3SVC stands for website and 1 or 87257621 stands for the unique identifier that is associated with a particular website.Q.) How do you know which identifier is associated with which website?A.) Goto, Inetmgr -> click on Web Sites and take a look iis status code at the right hand side screen ... And there you have it the Identifier column. This identifier is unique and no 2 websites have the same identifier. Even if you delete and recreate the same website you will notice that the website identifier is different.Once you go into the log folder you will see logs depending on the format you have chosen. By default in IIS 6, they are daily. And the log filenames are in the format exYYMMDD.log ... (ROVASTAR, thanks for the inputs)A typical Log information for a request would look something like this ....2008-04-11 20:39:48 127.0.0.1 GET /test/1.asp - 80 - 127.0.0.1 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.2; +.NET+CLR+1.1.4322) 200 0 02008-04-11 20:40:04 127.0.0.1 GET /test/1.asp - 80 - 127.0.0.1 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.2; +.NET+CLR+1.1.4322) 404 2 1260In the above example I have highlighted the Status Code and the Sub-Status code ... In the first case we have the values as 200 0 where in the status code is 200 and the sub status code is 0. 200 status code stands for "Request ok." Therfore, just by a look at the log we can determine that the request was served properly by IIS.... Moving on to the next example the 2 numbers are 404 and 2 , where in 40
IIS 500 errors leave clues in the log Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Yesterday I was playing around with thevalidateIntegratedModeConfiguration="true" setting on IIS 7.5. To my surprise I got an empty response back, with no indication of what went wrong. Looking at the response with Fiddler yields: HTTP/1.1 500 Internal Server Error Server: Microsoft-IIS/7.5 X-Powered-By: ASP.NET Date: Mon, 05 Mar 2012 15:59:52 GMT Content-Length: 0 There's not much to work with here! I checked the event log, there was nothing there. So I started looking around for an error log of some sort (I used to play with Apache back in the days) turns out there's no such thing in IIS. Some googling led me to an in-depth article:Troubleshoot IIS7 errors like a pro. I enabled detailed error messages for my website, still no luck. Finally, I figured out that the easiest way to get an indication of what's going on is to check the IIS log. In the default setup, IIS keeps the logs for each website in:C:\inetpub\logs\LogFiles. Here's a log entry from my logfile (shortened for readability): 2012-03-05 15:59:52 ::1 GET /Somesite/ - 443 - ::1 Mozilla/5.0 500 22 50 1 Notice the "500 22" in the log? That's the 500 error, along with its substatus. The substatus is the key here, as you can look that up inMicrosoft's document onThe HTTP status codes in IIS 7.0 and in IIS 7.5. Voila, my error was actually: 500.22 - An ASP.NET httpModules configuration does not apply in Managed Pipeline mode. I can work with that. Of course, you could also enable failed request tracing in IIS if you're a pro, here's a walkthrough by the IIS team:Troubleshooting Failed Requests Using Tracing in IIS 7. I tried it, and it also revealed the substatus of the response. Still, checking the IIS log was a much faster way of getting an indication of what the problem was, and sometimes that's all you need. So check your logs first, then start troubleshooting like a pro! Posted by AndrĂ