Messaging function failed to trigger

Question

Hi,

We noticed that one of our queue-triggered functions wasn’t working correctly, which caused us to not receive payments from customers properly. The items were sitting in the queue but weren’t being picked up, and there were no error codes. Once we restarted the function, it started working as expected.

Could you please investigate this issue and let us know what caused it? Please let me know if you need any further details.

Best,

Melih

Answer 1

Hello Melih Caliskan,

Thanks for posting your question in Microsoft Q&A forum

To help us pinpoint the issue, could you please provide answers to the following questions

1. Were there any recent changes made to the function or the associated Azure resources?
2. Is Application Insights enabled, and have you checked for any relevant errors in the logs?
3. Are there other Function Apps that could potentially be interacting with the same queue?
4. What is the current hosting plan of the Function App (Consumption or Dedicated)?

I will give you the possible Causes of the issue,

• Function Runtime Issues: The Function Runtime may not have started up properly. If you have Application Insights enabled, you can check for any failure messages.
• Invocation Failures: If the function was triggered but failed to complete, there might be exceptions during its execution.
• Competing Function Apps: If another Function App is also listening to the same queue, it may lead to one function appearing idle. Check if there are any other Function Apps configured for the same queue.
• Idle Function App: If you're using the Consumption Plan, the Function App may enter an idle state if there are no requests. If you’re on a Dedicated Plan, ensure that Always On is enabled to keep it active.

Recommended Actions to be taken:

• Enable Application Insights if it's not already active to gather more telemetry data.
• Review Function App Configuration: Make sure everything is set up correctly, especially around queue settings.
• Monitor Logs: Increase logging verbosity to catch any underlying issues that may not be explicit now.

Refer document: Monitor executions in Azure Functions | Microsoft Learn

I hope the provided answer is helpful, do let me know if you have any further questions on this Please accept as Yes if the answer is helpful so that it can help others in the community.