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Operators can still format clusters the same way as prior to this KIP. However, the --cluster-id flag now becomes optional.
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When --cluster-id is not specified, and the formatter's resolved MV supports ClusterIdRecord, write meta.properties V2 with an empty cluster.id.
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If the formatter's resolved MV does not support ClusterIdRecord, formatting will fail.
meta.properties will be written during kafka broker/controller startup if it doesn't exist already (from formatting)
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