Handling failed messages with Deadletter Queue and Sitecore Workflow

In my last post, I implemented a message queue which decoupled our application and provided a level of redundancy for our messages. But what about messages that are not processed successfully? This could occur for a number of reasons there might be an issue with the consuming application, a network issue or even an invalid message request.

A Deadletter queue, also known as an undelivered-message queue is a holding queue for messages that cannot be delivered to their destination. They provide a mechanism for persisting your failed messages without continually trying to process the same message. The deadletter queue could then be monitored and any failed messages can be examined and appropriate corrective action taken.

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