Spring Boot + RabbitMQ 消息在延迟交换时丢失

Question

我正在使用 spring boot convertAndSend()在延迟交换上发布消息，但该消息从未在队列中发布，也没有抛出任何异常

Answer 1

is never being published on the queue and there isn't any exception being thrown

When a system wants to communicate via a message broker the developer needs a clear understanding of the delivery semantics. At first one needs to know if and how often a message will be delivered to the broker (and potential consumers):

1. At most once – the message is delivered at most once but also not at all.
2. At least once – the message guaranteed to be delivered but can be delivered multiple times.
3. Exactly once – the message is guaranteed to be delivered exactly once.

The reasons why your messages are lost is because probably you are using at most once semantics.

You can configure at least once delivery semantics if you follow this guide

Does this solve your problem ? Tell me in the comments.