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Application Request Routing(ARR) health gets response as 503 for the target services on Windows server 2019

Arpit Jain 0 Reputation points
2023-01-23T07:41:32.1966667+00:00

We have ARR (Application Request Routing) setup for our service. This works fine if we use server 2016. But as soon as we upgrade the server to 2019, ARR health check starts getting 503 for the test URL intermittently and mark the server unhealthy. This cause service availability issue as 1 of server is not there now.

Not sure what is wrong here. We are only updating Server to 2019 version. Please help to know the fix.

Windows for business | Windows Server | User experience | Other
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  1. Limitless Technology 44,776 Reputation points
    2023-01-23T17:01:30.97+00:00

    Hello there,

    Have you tried cheking the Logs ? To investigate this a bit further enable Failed Request Tracing on the IIS server.

    Failed Request Tracing Rules is a powerful tool for troubleshooting request-processing failures in IIS 7.0 and above.

    Using Failed Request Tracing Rules to Troubleshoot Application Request Routing https://learn.microsoft.com/en-us/iis/troubleshoot/using-failed-request-tracing/using-failed-request-tracing-rules-to-troubleshoot-application-request-routing-arr

    Troubleshooting 502 Errors in ARR https://learn.microsoft.com/en-us/iis/extensions/troubleshooting-application-request-routing/troubleshooting-502-errors-in-arr

    Hope this resolves your Query !!

    --If the reply is helpful, please Upvote and Accept it as an answer–

  2. Arpit Jain 0 Reputation points
    2023-02-08T06:55:23.3966667+00:00

    can anyone help here?

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