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https://issues.apache.org/jira/browse/KAFKA-1028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812345#comment-13812345
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Jason Rosenberg commented on KAFKA-1028:
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Agreed on a default setting. Also, it would be nice if this could be
configurable for topics identified with a regex, so that all topics that match
"*.reliable.*" will have this feature applied.
Also, it would be good for it be applicable to existing topics, not only newly
created ones, so existing topics in a running system can have the benefit of
this feature.
(In general too, default settings for topics identified via regex, and
retroactive applicability, are desirable for all per topic config options).
> 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
>
> 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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