503 – Service Unavailable when requesting element log files

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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.

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 10th July 2023

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Is this happening on a Windows Server 2016 Version 1709?

If so, this KB of Microsoft might help you out: https://support.microsoft.com/en-us/help/4050891/error-http-503-and-was-event-5189-from-web-applications-on-windows-10

Ruben Vandepitte [SLC] [DevOps Advocate] Posted new comment 4th August 2020
Ruben Vandepitte [SLC] [DevOps Advocate] commented

Thanks Bert.
This is happening on a Windows Server 2019 (clean DMA install).
Just to be sure, I removed the temp files described in the linked KB article, but saw no change afterwards.
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