Dead-letter queue

MQe has a similar dead-letter queue concept to MQ. Such queues store messages that cannot be delivered. However, there are important differences in the manner in which they are used.
  • In MQ, if a message is being moved from queue manager A to queue manager B, then if the target queue on queue manager B cannot be found, the message can be placed on the receiving queue manager's (B's) dead-letter queue.
  • In MQe, if home-server queue on a client pulls a message from a server and is not able to deliver the message to a local queue and the client has a dead letter queue, the message will be placed on the client's dead letter queue.
    Note: In C, the Dead letter queue is just a local queue with a specific name.

    The use of dead-letter queues with an MQ bridge needs special consideration. For more information, see MQ bridge queue.


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