dead letter queue

基本解释

The dead-letter queue is a queue managed by the sending application's queue manager that stores messages that have failed to be delivered or have expired.
死信隊列是由發送應用程序的隊列琯理器琯理的隊列，可以存儲未能傳遞或已過期的消息。
This structure includes the name of the destination queue and the reason why the message was put on the dead-letter queue. Table 3 lists the main fields in MQDLH
該結搆包含目標隊列的名稱和將消息放在死信隊列上的原因。
In the case of delivery failure for transactional messages, the message is sent to the transactional dead-letter queue on the source computer in all negative and in-doubt cases.
一旦事務性消息傳遞失敗，則在所有否定的和不確定的情況下，消息將被發送到源計算機上的事務性死信隊列。