Azure API Management Operation Not Found exceptions

Question

Hi, We are seeing these exception in API Management. Not sure what these OperationNotFound are? It's like a ping request. any ideas?

Answer 1

@JoelP Thanks for reaching out. Thanks for reaching out. OperationNotFound errors are observed when the APIM is Unable to match incoming request to an operation. This is mainly when your client is calling the URI incorrectly i.e. there is no match with the request URI that you have configured in your APIM. Predefined errors for built-in steps error reasons are documented here.

Feel free to get back to me if you have any queries or concerns.

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Answer 2

Joel Prescilla The path /status-0123456789abcdef is a default path commonly used by applications such as Application Gateway, Application Insights etc. for probing API Management. The endpoint https://<apimname>.azure-api.net/internal-status-0123456789abcdef is available for all tiers except Consumption tier. If you have Consumption based APIM instance, this endpoint is not available and would get 404 error.

You can search IP address in https://www.microsoft.com/en-us/download/details.aspx?id=56519 to see which service was calling this endpoint and disable it. If you find calling service as Application Insights, then I suggest you follow the steps described in this thread. Let us know if it helps or have any questions.