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https://issues.apache.org/jira/browse/KAFKA-19663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18022613#comment-18022613
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TaiJuWu commented on KAFKA-19663:
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If we don't need all controllers including observers, that is good enough.
But there is another benefit if we have KIP is we can align the tool usage like
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-1147%3A+Improve+consistency+of+command-line+arguments]
> kafka-broker-api tool should support to get controller api version
> ------------------------------------------------------------------
>
> Key: KAFKA-19663
> URL: https://issues.apache.org/jira/browse/KAFKA-19663
> Project: Kafka
> Issue Type: New Feature
> Reporter: TaiJuWu
> Assignee: TaiJuWu
> Priority: Major
> Labels: need-kip
>
> like tool kafka-broker-api-versions.sh, we can get all RPC version from
> broker.
> It should also support for controller.
> KIP:
> [https://cwiki.apache.org/confluence/display/KAFKA/KIP-1220%3A+kafka-broker-api-versions+tool+support+controllers]
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