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https://issues.apache.org/jira/browse/KAFKA-763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583932#comment-13583932
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Neha Narkhede commented on KAFKA-763:
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Why is this option useful ? The reason we set the follower to fetch from the
beginning is because we want the follower to be an exact replica of the leader.
If it fetches from the tail, it may not necessarily be identical
> Add an option to replica from the largest offset during unclean leader
> election
> -------------------------------------------------------------------------------
>
> Key: KAFKA-763
> URL: https://issues.apache.org/jira/browse/KAFKA-763
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 0.8
> Reporter: Jun Rao
> Assignee: Jun Rao
> Priority: Blocker
> Attachments: kafka-763_v1.patch
>
>
> If there is an unclean leader election, a follower may have an offset out of
> the range of the leader. Currently, the follower will delete all its data and
> refetch from the smallest offset of the leader. It would be useful to add an
> option to let the follower refetch from the largest offset of the leader
> since refetching from the smallest offset may take some time.
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