How to fix an Azure Queue triggered function that cannot pull a queue item from the Queue?

Question

This is a simple test to see whether I can push to an Azure Queue and pull from it, but it continously keeps failing this test. I have a HTTP triggered function that does this:
QueueClient.from_connection_string(os.environ.get('triagingcapability83b6_STORAGE'), queue_name="document-chunks").send_message(json.dumps({"text": "This is random test data for testing the queue trigger functionality - blob processed!", "chunk_id": 1, "source_blob": "test_blob.txt"}, ensure_ascii=False)),

Then I'm trying to use this function to print my queue item to the log:

but every time I do this I get the warning 'Message has reached MaxDequeueCount of 5. Moving message to queue 'document-chunks-poison'. I'm not really sure where the error is here. I've tried different types of encoding of pushing to the queue. When I use the azure portal and manually had a piece of text to the queue the function triggers though.

Answer 1

Hello Neel Rajesh •,

The error message indicates that the function is failing to process the queue message and is hitting the MaxDequeueCount, causing it to be moved to the poison queue.

1. Message Format Issues: Please verify that the message being sent is properly formatted as UTF-8 encoded JSON. Additionally, confirm that the connection string is correct and the payload is free of errors.
2. Unhandled Exceptions: If json.loads() fails or if parsed_json is accessed before being defined, errors may occur without clear notification. Please ensure that all JSON parsing is performed safely to prevent such issues.
3. False Success Logging: The function currently logs "completed successfully" even if an error occurs. Please make sure this message is only logged after the process completes without errors.
4. Debug Tip: Test with a simple message like {"test": "hello"} to isolate the problem.
5. Enhanced Logging: Modify the host.json file to enable debug-level logging for improved traceability.