Subdomain does not map to a resource on APIM

van Oijen, Mischa 10

As of today both or our APIMS (stg and prd) stopped working, both with the same error => {"error":{"code":"ResourceNotFound","message": "Subdomain does not map to a resource."}}

We did not change a thing and the system worked fine for the last year

Was something changed on APIM? Does anyone have the same issue?

Ayce 5 Reputation points

2024-10-08T23:24:05.2033333+00:00

We have exactly the same issue today. The only difference is we are using application gateway instead of APIM but the error message is the same and we haven't changed anything as well.
Ayce 5 Reputation points

2024-10-08T23:25:50.5233333+00:00

Are you still experiencing the same issue?
Khadeer Ali 1,210 Reputation points Microsoft Vendor

2024-10-09T01:02:32.5166667+00:00
Hi @van Oijen, Mischa ,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

We understand that both your staging and production APIM instances have stopped working because of Subdomain mapping issue.

This issue can occur due to various reasons:

DNS Configuration: There might be an issue with your DNS records. Please ensure that your DNS settings are correctly pointing to appropriate APIM instance.

Custom Domain Settings: If you are using custom domains, verify that the domain settings in your APIM are correctly configured. This includes checking the validity of SSL certificates.

APIM Instance Status: Ensure that your APIM instances are running and there are no outages or maintenance activities affecting them. You can check the Azure Service Health dashboard for any ongoing issues.

To resolve this issue, we recommend the following steps:

Create a Custom Subdomain Name:

Sign in to the Azure Portal

Locate your Resource.

In the Overview section, click on Generate Custom Domain Name.

Follow the instructions to create a unique subdomain for your resource.

Ensure Proper Access with RBAC:

Make sure the user accessing the resource has the appropriate permissions, such as Owner or Contributor roles.

If the issue persists, please do not hesitate to reach out further assistance. If you find this answer helpful, please click "Comment" and kindly upvote it.
Khadeer Ali 1,210 Reputation points Microsoft Vendor

2024-10-10T01:25:01.1766667+00:00

Hi @van Oijen, Mischa

We haven’t heard from you on the last response and was just checking back to see if you have a resolution yet. In case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.

1 answer

LeelaRajeshSayana-MSFT 16,601 Reputation points

2024-10-11T21:18:12.25+00:00
Hi @van Oijen, Mischa Greetings! Welcome to Microsoft Q&A forum. Thank you for posting this question here.

I understand that this situation may have caused some inconvenience, and I want to express my gratitude for your efforts and patience while this is being handled.

There is no outage reported by Azure API Management service on the date you have reported the issue. Here are a couple of things you can check to better understand this potential cause

Navigate to Service Health and look for events under the History --> Health History. This reports any planned maintenance activities in the past. Inspect the activities to Impacted Services. If your APIM is using an Open AI specification end point or any other Azure service API point which is listed in the impacted services, that would cause an intermittent outage as the update happens.

If you have used any certificates while setting up the subdomain, inspect the certificates to see if they are not expired.

If you continue to face this issue even after validating the above steps, please reach out to us through the comments below and we will be able to assist you further.

If the response helped, please do click Accept Answer and Yes for the answer provided. Doing so would help other community members with similar issue identify the solution. I highly appreciate your contribution to the community.
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Khadeer Ali 1,210 Reputation points Microsoft Vendor

2024-10-16T01:25:27.0833333+00:00

Hi @@van Oijen, Mischa,
Just checking in to see if the below answer provided by @LeelaRajeshSayana-MSFT helped.

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.
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Subdomain does not map to a resource on APIM

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