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https://issues.apache.org/jira/browse/KAFKA-7335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16591030#comment-16591030
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Badai Aqrandista commented on KAFKA-7335:
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Can we have this manually configured as well in server.properties or like myid
file in zookeeper? So user can specify explicitly that a broker is part of a
certain cluster?
> Store clusterId locally to ensure broker joins the right cluster
> ----------------------------------------------------------------
>
> Key: KAFKA-7335
> URL: https://issues.apache.org/jira/browse/KAFKA-7335
> Project: Kafka
> Issue Type: Improvement
> Reporter: Jason Gustafson
> Priority: Major
>
> We have seen situations where a broker somehow got the wrong configuration
> and joined a different cluster than the one it was previously registered in.
> This can create various kinds of metadata inconsistencies in the cluster and
> can be difficult to debug. It was suggested in
> [KIP-78|https://cwiki.apache.org/confluence/display/KAFKA/KIP-78%3A+Cluster+Id]
> that we could store the clusterId locally after initial registration and
> verify upon startup that the locally stored value matches what is in
> zookeeper.
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