Backend & systems·Queues, streams and delivery semantics
the message failed five times so it gets moved somewhere else, instead of blocking the queue forever by being retried in a loop.
Dead letter queue
Also calledDLQ
A separate destination for messages that exceeded their retry limit. It keeps one bad message from consuming the consumer's entire capacity and preserves the payload for inspection. A DLQ nobody alerts on or drains is just a slower way to lose the message.