If (await ProcessMessage(message, token))Īwait _subscriptionClient.CompleteAsync() Īwait _subscriptionClient.AbandonAsync(message.SystemProperties.
_subscriptionClient.RegisterMessageHandler( So, any message that resides in the dead-letter queue is called a dead-lettered message. The solution is to have a dedicated queue that holds these messages: it’s called a Dead Letter Queue - it’s kind of like a holding bay for the car. When a messaging system determines that it cannot or should not deliver a message, it may elect to move the message to a Dead Letter Channel. Max delivery count = 5, It's tried 5 times then it's moved to deadletters _subscriptionClient = new SubscriptionClient(connectionString, topicName, subscriptionName) The purpose of the dead-letter queue is to hold messages that cannot be delivered to any receiver, or messages that could not be processed. The Service Bus can’t deliver any messages until this message has gone, and this message can’t go, because there’s something wrong with it. Note - I added AbandonAsync logic as per comment suggestion, but still the message going to deadletter and not re-appearing in topic subscription.
#Service bus dead letter how to
How to prevent this? message should not go to deadletter queue and it's should wait for sometime to process ? In this case _subscriptionClient.CompleteAsync not called, but message is going to deadletter queue. What is a Dead-Letter Queue All Service Bus Queues and Subscriptions have a secondary sub-queue, called the dead-letter queue (DLQ).
Now if some exception occurs, say queue is full and not ready to take any new messages then I am generating exception and ProcessMessage gives false. This sample shows how to move messages to the Dead-letter queue, how to retrieve messages from it, and resubmit corrected message back into the main queue. Once one message processing is done then I made it CompleteAsync, only when ProcessMessage gives true. The ProcessMessage adding messages to one capacity bounded queue (not more than 200 messages at a time).
I am consuming messages from service bus topic/subscription.
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