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As another example, a user wanting to migrate from a Kafka cluster with version 2.4 and a Zookeeper cluster with version 3.5 to a Kafka cluster with version 3.X and Zookeeper cluster with version 3.8.1 could upgrade their Kafka cluster to 3.X and then their Zookeeper cluster to 3.8.1 or vice versa.

It is worth mentioning that Kafka is still tested for cluster upgrades between versions 0.8.2 and 3.4.

Below is an analysis of changes introduced in 3.7.0 and 3.8.0 and whether they will introduce breaking changes in Kafka or not.

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