I've been recently having problems with my Service Bus queue. Random messages (one can pass and the other not) are placed on the deadletter queue with the error message saying:
"DeadLetterReason": "Moved because of Unable to get Message content There was an error deserializing the object of type System.String. The input source is not correctly formatted."
"DeadLetterErrorDescription": "Des"
This happens even before my consumer has the chance to receive the message from the queue.
The weird part is that when I requeue the message through Service Bus Explorer it passes and is successfully received and handled by my consumer.
I am using the same version of Service Bus either for sending and receiving the messages:
Azure.Messaging.ServiceBus, version: 7.2.1
My message is being sent like this:
await using var client = new ServiceBusClient(connString);
var sender = client.CreateSender(endpointName);
var message = new ServiceBusMessage(serializedMessage);
await sender.SendMessageAsync(message).ConfigureAwait(true);
So the solution I have for now for the described issue is that I implemented a retry policy for the messages that land on the dead-letter queue. The message is cloned from the DLQ and added again to the ServiceBus queue and for the second time there is no problems and the message completes successfully. I suppose that this happens because of some weird performance issues I might have in the Azure infrastructure. But this approach bought me some time to investigate further.