Why Are My GCP Functions Logging Errors for Non-200 Status Codes?

GCP Function Logs Errors Due to Non-200 Header Status Codes

Your function is experiencing response errors in GCP logs when the header status code is set to a value other than 200. Despite previous successful operation, this issue arose recently.

Possible Explanation and Resolution

Until recently, this behavior was not prevalent, indicating a potential change in the framework. A similar issue was encountered in the past, where the HTTP response of the function exceeded 10MB, triggering a response error.

To rule out this possibility, a simple function (getTest) was deployed, solely responsible for setting the status code to 201. Surprisingly, this also resulted in a response error.

Further investigation revealed an inconsistency with GCP's re-invocation behavior. Sometimes, GCP would automatically re-invoke the function with a 200 status, suggesting that the initial invocation failed despite code execution.

Update

Google has acknowledged and resolved this issue with an update rolled out on May 17, 2022. Cloud functions should now operate as expected. For further assistance, you can contact Google Support at issuetracker.google.com/issues/… or create a support case.

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