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Comment: Add section for rejected alternatives

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  • The KIP need to be released as part of the bugfix release to the last 3 versions
  • The KIP need to be backported into 3.1 and 3.2 (any other version reached EOL post KIP-690).  

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Users who upgrade from Kafka < 3.1 and wish to disable controlling internal topics using the separator will need to set `replication.policy.internal.topic.separator.enabled` to false. Any users upgrading from > 3.1 don't need to do anything.  

Rejected Alternatives

  • Introduce a LegacyReplicationPolicy that inherits DefaultReplicationPolicy that provide an override for ReplicationPolicy.offsetSyncsTopic and ReplicationPolicy.checkpointsTopic methods to use old topics and ignore the usage of the topic's separator. The advantage of this approach is avoiding introducing a new property to only fix a backward compatibility bug. However, this approach has a high risk of diversion between this new class and  DefaultReplicationPolicy at some point in the future. It also adds another class to maintain for MM2 without adding a big value for the connector besides fixing the backward compatibility bug.