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https://issues.apache.org/jira/browse/KAFKA-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13935570#comment-13935570
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Jay Kreps commented on KAFKA-1028:
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[~noslowerdna] I made a few very minor comments.
[~nehanarkhede] I had a question for you about the perf impact of adding these
zk queries in critical sections.
> per topic configuration of preference for consistency over availability
> -----------------------------------------------------------------------
>
> Key: KAFKA-1028
> URL: https://issues.apache.org/jira/browse/KAFKA-1028
> Project: Kafka
> Issue Type: Improvement
> Reporter: Scott Clasen
> Assignee: Neha Narkhede
> Attachments: KAFKA-1028.patch, KAFKA-1028_2014-01-30_13:45:30.patch,
> KAFKA-1028_2014-03-03_18:48:43.patch
>
>
> As discussed with Neha on the ML.
> It should be possible to configure a topic to disallow unclean leader
> election, thus preventing the situation where committed messages can be
> discarded once a failed leader comes back online in a situation where it was
> the only ISR.
> This would open kafka to additional usecases where the possibility of
> committted messages being discarded is unacceptable.
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