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https://issues.apache.org/jira/browse/KAFKA-13245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17408435#comment-17408435
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Ryan Dielhenn commented on KAFKA-13245:
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https://github.com/apache/kafka/pull/11290
> KIP 771: Change behavior of how controller metrics are exposed when using
> KRaft.
> --------------------------------------------------------------------------------
>
> Key: KAFKA-13245
> URL: https://issues.apache.org/jira/browse/KAFKA-13245
> Project: Kafka
> Issue Type: Improvement
> Reporter: Ryan Dielhenn
> Assignee: Ryan Dielhenn
> Priority: Major
>
> Zookeeper brokers expose 0 for controller metrics in the case of controller
> failover. KRaft brokers should not since they will never be elected as
> controller and since this would introduce a non-negligible performance impact.
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