我的 Azure Function 在 Python v2 没有显示任何运行的迹象，但它可能是

Question

I have a simple function app in Python v2. The plan is to process millions of images, but right I just want to make the scaffolding right, ie no image processing, just dummy data. So I have two functions:

• process with an HTTP trigger @app.route , this inserts 3 random image URLs to the Azure Queue Storage,
• process_image with a Queue trigger @app.queue_trigger , that processes one image URL from above (currently only logs the event).

I trigger the first one with curl request and as expected, I can see the invocation in the Azure portal in the function's invocation section and I can see the items in the Storage Explorer's queue.

But unexpectedly, I do not see any invocations for the second function, even though after a few seconds the items disappear from the images queue and end up in the images-poison queue. So this means that something did run with the queue items 5 times. I see the following warning in the application insights checking traces and exceptions :

Message has reached MaxDequeueCount of 5. Moving message to queue 'case-images-deduplication-poison'.

Can anyone help with what's going on? Here's the gist of the code .

Answer 1

If I was to guess, something else is hitting that storage queue, like your dev machine or another function, can you put logging into the second function? (sorry c# guy so I don't know the code for logging)

Have you checked the individual function metric, in the portal, Function App >> Functions >> Function name >> overview >> Total execution Count and expand to the relevant time period?

Do note that it take up to 5 minutes for executions to show but after that you'll see them in the metrics