Got Future attached to a different loop when using eventhub aio in Fastapi python

Question

I am using python 3.9, azure-eventhub 5.10.1, azure-eventhub-checkpointstoreblob-aio, and I have following code that throws the exception regularly (we also have lots of successful case that sends the message with no error), but also got the runtime errors in the logs. Wondering what i did wrong here. Thanks

async def send_to_eventhub(self, producer, event_list, timestamp_event_received):
    try:
        async with producer:
            event_data_batch = await producer.create_batch()
            for (occupancy_status, hardware_id) in event_list:
                # set message properties for space report
                message_body = {
                   ...
                }
                message = EventData(json.dumps(message_body))
                message.properties = {
                    ...
                }
                # Send message to the eventhub
                logger.info("Sending message %s, %s", message, message.properties)
                event_data_batch.add(message)
            await producer.send_batch(event_data_batch)
            logger.info(
                "Message successfully sent %s, %s", message, message.properties
            )
    except (
        EventDataError,
        EventDataSendError,
        OperationTimeoutError,
        OwnershipLostError,
        RuntimeError,
    ) as event_ex:
        logger.error(
            "eventhub Sending Error: Error ocurred\
                sending message for hardware id %s %s %s",
            hardware_id,
            event_ex,
            traceback.format_exc(),
        ) ```

And this function got called in the follow Fastapi

<!-- begin snippet: -->


    @app.post(...)
    async def handle_report(
        ...
    ):
        ...
        try:
            if len(incoming_data) > 0:
                event_list = []
                for sensor_data in incoming_data:
                    data = sensor_data["data"]
                    occupancy_status = json.loads(data)["value"]
                    hardware_id = sensor_data["properties"]["propertyList"][0]["value"]
                    event_list.append((occupancy_status, hardware_id))

                await eventhub_helper.send_to_eventhub(
                    producer, event_list, received_timestamp
                )
        ...`

<!-- end snippet -->

   

And the exception says:
`eventhub Sending Error: Error ocurred                    sending message for hardware id TSPR04ESH11000268 Task <Task pending name='Task-544711411' coro=<RequestResponseCycle.run_asgi() running at /opt/pysetup/.venv/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py:375> cb=[set.discard()]> got Future <Future pending> attached to a different loop Traceback (most recent call last):
  File "/app/eventhub_helper.py", line 94, in send_to_eventhub
    logger.info(
  File "/opt/pysetup/.venv/lib/python3.9/site-packages/azure/eventhub/aio/_producer_client_async.py", line 218, in __aexit__
    await self.close()
  File "/opt/pysetup/.venv/lib/python3.9/site-packages/azure/eventhub/aio/_producer_client_async.py", line 811, in close
    async with self._lock:
  File "/usr/local/lib/python3.9/asyncio/locks.py", line 14, in __aenter__
    await self.acquire()
  File "/usr/local/lib/python3.9/asyncio/locks.py", line 120, in acquire
    await fut
RuntimeError: Task <Task pending name='Task-544711411' coro=<RequestResponseCycle.run_asgi() running at /opt/pysetup/.venv/lib/python3.9/site-packages/uvicorn/protocols/http/httptools_impl.py:375> cb=[set.discard()]> got Future <Future pending> attached to a different loop`

I tried to reproduce this error, but it was hard because it went through with no error. Wondering if I did not consider concurrency enough. Did notice that "event_data_batch.add(message)" can cause error if that batch if full, but dont think it could cause runtime error and i know that message we sent is small