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https://issues.apache.org/jira/browse/KAFKA-7161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16544803#comment-16544803
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Guozhang Wang commented on KAFKA-7161:
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Thanks [~mjsax] !
> KTable Reduce should check for invalid conditions
> -------------------------------------------------
>
> Key: KAFKA-7161
> URL: https://issues.apache.org/jira/browse/KAFKA-7161
> Project: Kafka
> Issue Type: Improvement
> Reporter: John Roesler
> Assignee: John Roesler
> Priority: Major
>
> KTableReduce has the opportunity to explicitly check if the state is
> inconsistent with the oldValues arriving from the stream. If it did so, it
> could help detect topology changes that needed an app reset and fail fast
> before any data corruption occurs.
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