Function App Blob trigger only works when i open Log Stream in the Portal

Question

I am facing problem with Azure Function Apps.
I have publish/Deploy the Function App in python fron Visual Studio Code by using deploy option available next to fuction directly. It works fine locally.
I have not set any time to trigger blob storage. Instead I just want, when I upload a file to azure blob storage, the function app triggers the blob immediately. It works fine when I log in to Function App's Log stream Portal, but when I log off or close the log stream in Function App Portal the Function App doesn't trigger the blob.

Kindly, please help me.
Thanks

Answer 1

Now I got it:-

Polling and latency
Polling works as a hybrid between inspecting logs and running periodic container scans. Blobs are scanned in groups of 10,000 at a time with a continuation token used between intervals. If your function app is on the Consumption plan, there can be up to a 10-minute delay in processing new blobs if a function app has gone idle.

Solutions:-
If you require faster or more reliable blob processing, you should instead implement one of the following strategies:

• Change your binding definition to consume blob events instead of polling the container. You can do this in one of two ways:
  • Add the source parameter with a value of EventGrid to your binding definition and create an event subscription on the same container. For more information, see Tutorial: Trigger Azure Functions on blob containers using an event subscription.
  • Replace the Blob Storage trigger with an Event Grid trigger using an event subscription on the same container. For more information, see the Image resize with Event Grid tutorial.
• Consider creating a queue message when you create the blob. Then use a queue trigger instead of a blob trigger to process the blob.
• Switch your hosting to use an App Service plan with Always On enabled, which may result in increased costs.

It's mentioned in the documentation itself https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-storage-blob-trigger?tabs=in-process%2Cextensionv5&pivots=programming-language-python

If you have suggestions, welcome.