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Form Recognizer Connector Suddenly Failing with 404 "Resource Not Found" Error

Posted on 22 Nov 2024 14:13:50 by

Hello everyone,

I have a Power Automate flow that utilizes the Form Recognizer Connector to process documents. This flow has been running smoothly for several months without any issues.

However, all of a sudden, and without any changes made to the flow or the environment, the connector started failing. It returned the following error message:

{
    "statusCode": 404,
    "headers": {
        "Access-Control-Allow-Methods": "GET, PUT, PATCH, DELETE, POST",
        "Access-Control-Allow-Origin": "*",
        "Access-Control-Max-Age": "3600",
        "Access-Control-Expose-Headers": "*",
        "x-ms-dlp-re": "-|-",
        "x-ms-dlp-gu": "-|-",
        "Date": "Tue, 19 Nov 2024 22:53:32 GMT",
        "Content-Length": "54",
        "Content-Type": "application/json"
    },
    "body": {
        "statusCode": 404,
        "message": "Resource not found"
    }
}
 

Unfortunately, I was away at the time and couldn't address the issue immediately, resulting in over 100 flow executions failing during this period.

To resolve the problem, I simply created a new Connection Reference to the same Form Recognizer endpoint, and the flow started working correctly again.

My questions are:

  1. What could cause an existing connection to suddenly stop working without any changes made to the flow or the environment?

  2. How can I prevent this issue from occurring in the future to avoid failed flow executions?

Any insights or suggestions would be greatly appreciated.

Thank you!

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