How to view actual Azure Event Grid message?

Question

I have an Azure Function triggered by EventGridEvents.

function.json set accordingly:

{
    "scriptFile": "__init__.py",
    "bindings": [{
        "name": "event",
        "type": "eventGridTrigger",
        "direction": "in"
    }]
}

__init__.py dialed in (only snippet shown here):

def main(event: func.EventGridEvent):
        result = json.dumps({
            'id' : event.id,
            'data' : event.get_json(),
            'topic' : event.topic,
            'subject' : event.subject,
            'event_type' : event.event_type
        })

Function is successfully deployed
EventGrid trigger created successfully
I successfully published an EventGrid message here:

But the Function never triggered.

I'd like to now see the actual EventGrid message and debug why the Function didn't trigger, but I can't find a place to view the message!

I waited ~30mins, refeshed multiple times and was even watching the AppInsights live logs, no trigger.

Where do I view an EventGrid message after its successfully published
How should I debug this Function?

EDIT 1:

Digging around for a while I found this other "metric" that shows 0 Delivered Events

How is an event "Published" but not "Delivered"?

user_11816733 · Answer

I have done a test. On my side it seems no problem.

Maybe something different between yours and mine.

Please check:

_init_.py

import json
import logging

import azure.functions as func


def main(event: func.EventGridEvent):
    result = json.dumps({
        'id': event.id,
        'data': event.get_json(),
        'topic': event.topic,
        'subject': event.subject,
        'event_type': event.event_type,
    })

    logging.info('Python EventGrid trigger processed an event: %s', result)

function.json

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "type": "eventGridTrigger",
      "name": "event",
      "direction": "in"
    }
  ]
}

And this is my eventgrid subscription:(I add a blob to the specific container and delete it. Please notice that the metric of the eventgrid subscription may take about 5 minutes to show. But it will trigger your endpoint function immediately.)

This is the filter of my eventgrid subscription:

I want the blob created and deleted in the test container to trigger the endpoint azure function, so I add /blobServices/default/containers/test to the 'Subject Begins With' section.

Then my function works fine:

How to view actual Azure Event Grid message?

1 Answers