Reading IIS error logs – status and substatus

500-errorhttp-status-codeiis-8

While trying to troubleshoot an IIS error I came upon a guide that discussed the error code in the IIS log.

The 4 server logs you NEED to know to fix any IIS / ASP.NET error

The post uses the following excerpt from an IIS log file …

2013-06-16 03:39:19 ::1 GET /test.aspx mincase=80 80 - ::1 - 500 16 0 3173

The article goes on to say that the 500 represents the status code while the 16 is the substatus code. However, when I try and search for the status code via Google, I always see it referred to as 500.16. Is this essentially two different ways to reference the same error code? Is there a difference between and 500 16 and 500.16?

Best Answer

Two different ways of saying the same thing, yes.

For what it's worth, the 500.16 way of doing it is preferable, for being easier to search and organize, and a lot of error codes are done this way, for the same reason. http error codes, for example.

Related Solutions

Iis – Disabling IIS 7.5 server error response for 5xx and 4xx HTTP status codes

This was answered in another question: IIS7 Hijacks My Coldfusion Error Page

Seems that the solution is changing the configuration so that IIS ignores the error and allows it to pass through, hence the setting

    <httpErrors existingResponse="PassThrough" />

So the solution is to change the behavior of IIS, which is fortunate, because requiring every existing web application server to change their behavior would be really stupid.

Update

Please see my updated answer in another similar question to find out why and how there is no workable answer to this problem.

Iis – Trailing dots in url result in empty 404 page on IIS

Adding this attribute in the httpRuntime section may help you:

<configuration>
  <system.web>
    <httpRuntime ... relaxedUrlToFileSystemMapping="true" .../>
  </system.web>
</configuration>

Gets or sets a value that indicates whether the URL in an HTTP request is required to be a valid Windows file path.

More information about relaxedUrlToFileSystemMapping

Best Answer

Related Solutions

Iis – Disabling IIS 7.5 server error response for 5xx and 4xx HTTP status codes

Update

Iis – Trailing dots in url result in empty 404 page on IIS

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