THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- FindCoordinatorResponse and FindCoordinatorRequests need to update to V3.
- Requests that contains a single groupID still can be supported.
- Compatibility issues between old and new versions need to be considered, we should think about how to convert requests from a newer version to a old version.
Rejected Alternatives
- Update the batching logic in KafkaAdmin.java directly instead of modifying the structure of requests and response.
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