[Technical Question]How do I handle azure.iot.device send_message hanging when message quota is exhausted

I have a project on raspberry pi that sends telemetry data to azure hub. An issue I am coming up against is when I have exceeded by daily quota of messages being sent from my device to cloud, the following line hangs.

await client.send_message(message)

I am trying to get over this by using asyncio.wait_for, and setting a timeout of 2 secs, so that my code will not wait indefinitely to return from the send_message() method.

My code does timeout after the specified time, but I get another error that Im not sure how to deal with.

The code Im using is below…

from azure.iot.device.aio import IoTHubDeviceClient
from azure.iot.device import Message
import time
import asyncio
from datetime import datetime

    
async def SendMessage(clientPairingId,clientDeviceId,type,subType,deviceState,pairingSetpoint=None):

        

    messageTemplate = """{{"iotDeviceId":"{iotDeviceId}","timeStampUTC":"{timeStampUTC}","clientPairingId":"{clientPairingId}","clientDeviceId":"{clientDeviceId}","type":"{type}","subType":"{subType}","state": "{deviceState}","setPoint": "{pairingSetpoint}"}}"""        
    connectionString="**********"
    client = IoTHubDeviceClient.create_from_connection_string(connectionString)
    
    await client.connect()
    
    message = Message(messageTemplate.format(iotDeviceId="xx1",
                                            clientPairingId=clientPairingId,
                                            clientDeviceId=clientDeviceId,
                                            type=type,
                                            subType=subType,
                                            deviceState=deviceState,
                                            pairingSetpoint=pairingSetpoint,
                                            timeStampUTC=datetime.utcnow()))
   

    
    
    await client.send_message(message)
    #await asyncio.sleep(300)
    await client.shutdown()

async def main():
    for i in range(1):
        try:
            coros=[SendMessage(clientPairingId="cp1",clientDeviceId="cd1",type="D",subType="ST1",deviceState="On",pairingSetpoint="n/a")]
            
            await asyncio.wait_for(asyncio.gather(*coros),.5)
            
        except asyncio.TimeoutError:
            print("Timed out")
        except asyncio.CancelledError:
            print("Cancelled")
        except Exception as e:
            print(e)
        except:
            print("catch all")

def handle_exception(loop, context):
    msg=context.get("exception",context["message"])
    
if __name__ == "__main__":
    s = time.perf_counter()
    #asyncio.run(main())
    asyncio.run(main(),debug=False)
    elapsed = time.perf_counter() - s
    print(f"{__file__} executed in {elapsed:0.2f} seconds.")

output ################################################# Timed out _GatheringFuture exception was never retrieved future: <_GatheringFuture finished exception=ClientError(‘Unexpected failure’)> Traceback (most recent call last): File “/usr/local/lib/python3.7/dist-packages/azure/iot/device/iothub/aio/async_clients.py”, line 33, in handle_result return await callback.completion() File “/usr/local/lib/python3.7/dist-packages/azure/iot/device/common/async_adapter.py”, line 94, in completion return await self.future concurrent.futures._base.CancelledError

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File “/home/pi/CabinetFarming/WIP/POC_SimpleAzureSendMessageMock.py”, line 30, in SendMessage await client.send_message(message) File “/usr/local/lib/python3.7/dist-packages/azure/iot/device/aio/patch_documentation.py”, line 60, in send_message return await super(IoTHubDeviceClient_, self).send_message(message) File “/usr/local/lib/python3.7/dist-packages/azure/iot/device/iothub/aio/async_clients.py”, line 301, in send_message await handle_result(callback) File “/usr/local/lib/python3.7/dist-packages/azure/iot/device/iothub/aio/async_clients.py”, line 53, in handle_result raise exceptions.ClientError(message=“Unexpected failure”, cause=e) azure.iot.device.exceptions.ClientError: ClientError(‘Unexpected failure’) caused by CancelledError() POC_SimpleAzureSendMessageMock.py executed in 0.51 seconds.

[terryholland]

I currently have some issue with my azure subscription and my services are disabled. I am trying to resolve asap after which I will be able to test. I will let you know as soon as I have done so

[terryholland]

This may be because Im calling this code from multiple threads. I will try to lock the code and run again continuously. I need this code to run 24/7 so I will keep test going for as long as possible