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https://issues.apache.org/jira/browse/KAFKA-21378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18133372#comment-18133372
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Luke Chen commented on KAFKA-21378:
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[~christo_lolov] , thanks for interesting in this feature. This task is needed
and can be started first. I assigned to you first, but if you are not
interested or don't want to take it, just let me know. Thank you.
> Add "leaderEpoch" field in PartitionChangeRecord
> ------------------------------------------------
>
> Key: KAFKA-21378
> URL: https://issues.apache.org/jira/browse/KAFKA-21378
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Luke Chen
> Assignee: Christo Lolov
> Priority: Major
>
> To support "bumpLeaderEpoch" RPC in the future, we should add a "leaderEpoch"
> field in PartitionChangeRecord, and move the leader epoch calculation logic
> from currently each node calculate the leader epoch when replying
> PartitionChangeRecord in PartitionRegistration class, to each time the
> PartitionChangeRecord creates, and each node only needs to take the
> leaderEpoch in the PartitionChangeRecord.
>
> We should also consider the backward compatibility in this change.
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