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Discussion thread: here

JIRA:

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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The `CreateTopicsRequest` will bump its protocol version to 4 so that any requests sent to old brokers with the default values and no replica assignments will fail with a UnsupportedVersionException.

To exploit this new feature in KafkaStreams, we update the default value of Streams configuration parameter `replication.factor` from `1` to `-1`. Cf KIP-733: change Kafka Streams default replication factor config

Proposed Changes

The change is straightforward, AdminManager on the broker will modify its verification logic to the following:

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