问题
I have a custom Endpoint + Route setup based on TwinChangeEvent in Azure IoT Hub. I'm routing the events to a Service Bus Queue (tried topic also). I'm using Java Service Bus SDK (azure-servicebus-1.1.0.jar) to pull messages off of the queue.
However, I keep getting a NullPointerException in
com.microsoft.azure.servicebusMessageConverter on line 124 "brokeredMessage.setMessageId(amqpMessage.getMessageId().toString());"
The messageId property seems to be getting lost during the routing.
Any way to get around this?
I don't see anywhere in the Azure IoT Device SDK where I would need to set this once I've processed the original message from IoT Hub indicating the property changed.
Thanks
来源：https://stackoverflow.com/questions/47329990/amqp-message-null-when-using-azure-iothub-routing