Page History

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1. log.message.format.version & message.format.version are removed. They won't serve any purpose and the fact that the allowable values are Kafka versions instead of message format versions has been a source of confusion. If we introduce new message format versions, they should use actual message format versions (v0, v1, v2, v3, etc.).
2. Produce requests won't support up-conversion from message formats v0 and v1.
3. Fetch requests won't support down-conversion to message formats v0 and v1.

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