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During the rebalance process, each consumer will execute the same deterministic algorithm to range partition a sorted list of topic-partitions over a sorted list of consumer instances. This makes the whole rebalancing process deterministic. For example, if you only have one partition for a specific topic and going to have two consumers consuming this topic, only one consumer will get the data from the partition of the topic, ; and event even if the consumer named "Consumer1" is registered after the other consumer named "Consumer2", it will replace "Consumer2" gaining the ownership of the partition in the rebalance.

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