In most cases, Message Queue for Apache RocketMQ can ensure that no duplicate messages are delivered to subscribers.

In most cases, Message Queue for Apache RocketMQ can ensure that no duplicate messages are delivered to subscribers. As a distributed messaging middleware, Message Queue for Apache RocketMQ cannot ensure that no duplicate messages are delivered to subscribers when exceptions such as network jitter and application processing timeout occur. However, Message Queue for Apache RocketMQ can ensure that no messages are lost.