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https://issues.apache.org/jira/browse/KAFKA-19663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023270#comment-18023270
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Chia-Ping Tsai commented on KAFKA-19663:
----------------------------------------

I assume the tool could leverage a bootstrap broker to obtain all node 
endpoints.

1. Retrieve voter endpoints by describing the quorum
2. Use the voter endpoints to discover observer endpoints by describe the 
cluster

With this approach, we don’t need to modify the (public) input configs

> 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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