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Since this KIP follows KIP-175, the output for sub-options --members and --state that are introduced in that KIP will be modified to also include the newly added fields. Therefore, clients who rely on the output for those sub-options may need to be adjusted. It also helps the consumer group --describe command to fill some of the newly added columns introduced by KIP-175 (i.e. ASSIGNMENT-STRATEGY for --members options, and SUBSCRIPTION for --members --verbose option).

Users who use the new-consumer based consumer groups and rely on the output of the --describe option of the ConsumerGroupCommand may have to adjust their clients to use the new output format of the affected command options; for example, in case they rely on the fact the command currently returns members with no assignment.

Rejected Alternatives

There are other information available for a consumer group that could be included in the KIP. For example:

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