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From "Guozhang Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-763) Add an option to replica from the largest offset during unclean leader election
Date Wed, 20 Feb 2013 18:59:12 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13582415#comment-13582415
] 

Guozhang Wang commented on KAFKA-763:
-------------------------------------

Just a quick question: what is an "unclean leader election"?
                
> 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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