IIS 6 on a Windows 2003 Server. Additional components are FastCGI/PHP 5.2. My websites will load perfectly for a time. Usually at least once a day though the websites become unavailable, the error that IIS reports is HTTP Error 401.1 - Unauthorized: Access is denied due to invalid credentials. I will restart IIS and everything will start working again.
Because it is intermittent I am not sure where to start. Any ideas would be appreciated.
HTTP Error 401.1 - Unauthorized: Access is denied due to invalid credentials.
Internet Information Services (IIS)
Debug Tools to analyse IIS process:
This article focus on taking memory dumps from IIS to determine which code is taking more time and to analyse which calls hangs/causes more CPU usage.
To take dumps,download the following.
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