Question

我正在考虑将 Azure IoT 中心用作工业生产交付的一部分。到目前为止，我遇到了大量的连接错误。在 1000 条消息中，我收到 35 个 InvalidStateErrors、16 个 ConnectionDroppedErrors 和 7 个由对等方重置的连接。我在一个高度可靠的有线以太网连接上，在同一时期没有 ICMP 数据包丢失。我的代码是否有问题，或者只是 Azure IoT 服务必须接受的问题？

Ping 输出

Ping output: no drops, 2.6 ms reply max

可靠性测试代码

import asyncio
import sys

from azure.iot.device.aio import IoTHubDeviceClient


# IoTHubDeviceClient reports errors to stderr. Using this class to grab and count them before printing
class Redirect_stderr:
    stderr = sys.stderr
    errors = {
        "InvalidStateError": 0,
        "ConnectionDroppedError": 0,
        "Connection reset by peer": 0,
        "Timeout": 0,
    }
    collect_errors = ""

    def __enter__(self):
        sys.stderr = self

    def __exit__(self, exc_type, exc_val, exc_tb):
        sys.stderr = self.stderr
        print(self.collect_errors, file=sys.stderr)
        print(self.errors)

    def write(self, text):
        for error in self.errors.keys():
            if error in text:
                self.errors[error] += 1
        self.collect_errors += text
        self.stderr.write(text)


async def main():
    with Redirect_stderr():
        conn_str = "HostName=IoTHubForTest23.azure-devices.net;DeviceId=testDevice;SharedAccessKey=***redacted***"
        client = IoTHubDeviceClient.create_from_connection_string(conn_str)
        await client.connect()
        for i in range(500):
            try:
                print(f"message count: {i}")
                task = asyncio.create_task(client.send_message(f"Message {i}"))
                await asyncio.sleep(1/2) # IoT Hub B1 has a message limit of four per second, making absolutely sure not to flood it
                await asyncio.wait_for(task, 10-1/2) # In total, 5 second message timeout
            except asyncio.TimeoutError:
                print("Timeout", file=sys.stderr)


if __name__ == "__main__":
    asyncio.run(main())

输出

{'InvalidStateError': 28, 'ConnectionDroppedError': 5, 'Connection reset by peer': 7}

Azure IoT 连接断开

0 个答案: