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同一个消费者组的话，里面的消费者的订阅关系必须是一致的，文档：https://rocketmq.apache.org/docs/bestPractice/05subscribe 你指的是不同的消费者组订阅不同的tag是否会互相影响？这必然不会，每个消费者组都相当于是独立的 |
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这是订阅关系不一致了吧。 同一 ConsumerGroup 下的三个Consumer实例C1、C2和C3分别都订阅了TopicA，但是C1订阅TopicA的Tag为Tag1，C2和C3订阅的TopicA的Tag为Tag2，订阅同一Topic的Tag不一致，不符合订阅关系一致性原则 |
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对的，订阅关系不一致会有问题，会造成rebalance异常，导致队列无消费者消费 |
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不同的消费者订阅同一个topic的不同tag，消息多的tag是否会影响消息少tag的消费速度
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