Service Bus Messages Trigger Twice

test29998411 281

In some cases, the following message is output twice by Azure Functions of Service Bus trigger.
Is it best to implement the same to skip the processing of Azure Functions when the above log is output more than once?

# Application insights log
Trigger Details: MessageId: xxxxx, DeliveryCount: 1, EnqueuedTime: 5/14/2021 7:10:02 AM, LockedUntil: 5/14/2021 7:10:22 AM, SessionId: (null)
Trigger Details: MessageId: xxxxx, DeliveryCount: 1, EnqueuedTime: 5/14/2021 7:10:02 AM, LockedUntil: 5/14/2021 7:10:42 AM, SessionId: (null)

Pierre-Luc Giguere 1,076 Reputation points

2021-09-13T16:57:39.95+00:00
Hi Taichi,

If you go to the Kudu console :

App not in Isolated tier: https://<app-name>.scm.azurewebsites.net

App in Isolated tier (App Service Environment): https://<app-name>.scm.<ase-name>.p.azurewebsites.net

(See: https://learn.microsoft.com/en-us/azure/app-service/resources-kudu)

Then go to the debug console and navigate to D:/LogFiles/Application/Function/Host does it show any errors with the same timestamp?
Pramod Valavala 20,591 Reputation points Microsoft Employee

2021-09-14T08:41:38.04+00:00

@test29998411 Could you confirm there is no error in your function execution and you don't have retry policies setup?
test29998411 281 Reputation points

2021-09-14T14:31:13.527+00:00

Thank you, I found that the log file was output to the path you told me.
However, I am wondering if the above log file is output in real time.
Is there a document that describes log output and when log rotation occurs?

https://learn.microsoft.com/en-us/azure/app-service/troubleshoot-diagnostic-logs#access-log-files