Jun Rao created KAFKA-5036:
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Summary: Followups from KIP-101
Key: KAFKA-5036
URL: https://issues.apache.org/jira/browse/KAFKA-5036
Project: Kafka
Issue Type: Improvement
Affects Versions: 0.11.0.0
Reporter: Jun Rao
Assignee: Jun Rao
1. It would be safer to hold onto the leader lock in Partition while serving an
OffsetForLeaderEpoch request.
2. Currently, we update the leader epoch in epochCache after log append in the
follower but before log append in the leader. It would be more consistent to
always do this after log append. This also avoids issues related to failure in
log append.
3. OffsetsForLeaderEpochRequest/OffsetsForLeaderEpochResponse:
The code that does grouping can probably be replaced by calling
CollectionUtils.groupDataByTopic().
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