What could cause a '503 - Service Unavailable' HTTP error when requesting element log files? On one of our systems, we are facing this error for all elements, also when directly browsing to the log file URL while being logged in to the DataMiner server which is hosting the element.
The problem persists after restarting both IIS and the DataMiner Agent.
This could be caused by many reasons, most likely a configuration/installation issue. To find the root cause, this has to be further investigated:
- Does it show this error only when accessing viewlog.asp, or also when opening other web pages, for example Reporter?
- In Windows' Roles and Features, is "ASP" installed?
- Are there more error details in the logging of IIS? (C:\inetpub\logs\LogFiles)
- Are there any related errors in the logging of Windows?