azureservicebus - Azure durable function log stream showing deleted function

Question

I have deployed a change to a durable function product into Azure DevOps and part of the work was to rename an activity function.

However the warning below is appearing in the log stream containing the old name for the function.

[Warning] Activity function 'PublishNotification' does not exist.. InstanceId: . Function: PublishNotification.

This function publishes a message to a Service bus topic, and there is definitely now no reference to that function name anywhere in the code.

Any ideas where this might be coming from?

Answer 1

From your description, it seems that your function name has been changed, the orchestrator function listener and other function listeners are been deregistered:

https://github.com/Azure/azure-functions-durable-extension/blob/f6f1dce716b68d8baaa99ed64a9db1306577c58d/src/WebJobs.Extensions.DurableTask/Listener/DurableTaskListener.cs#L44-L54

But the orchestrator function is still running, and it cannot find your previous function name:

https://github.com/Azure/azure-functions-durable-extension/blob/f6f1dce716b68d8baaa99ed64a9db1306577c58d/src/WebJobs.Extensions.DurableTask/DurableOrchestrationContext.cs#L385

If you restart the function app and let everything start again, can you still reproduce this error?