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https://issues.apache.org/jira/browse/KAFKA-19608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18049835#comment-18049835
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David Dufour commented on KAFKA-19608:
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Any feedback on this?
> REBOOTSTRAP_REQUIRED leave connections to group coordinator untouched
> ---------------------------------------------------------------------
>
> Key: KAFKA-19608
> URL: https://issues.apache.org/jira/browse/KAFKA-19608
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 4.0.0
> Reporter: David Dufour
> Priority: Major
>
> KIP-1102 has introduced a new error code to instruct clients to rebootstrap.
> This error has been introduced to help proxies to instruct the clients to
> reboostrap when brokers have changed.
> However, the current implementation in group consumers leave the connections
> to the group coordinator intact.
> As a result, when doing a cluster failover:
> - the clients receive REBOOTSTRAP_REQUIRED
> - the broker connections are reboostrapped, connections to the primary
> cluster are closed and connections to the secondary clusters are opened
> - the consumers are still connected to the group coordinator of the primary
> cluster
> ==> the consumers are:
> - fetching data from the secondary cluster
> - sending hearbeats to the primary cluster
> The consumers are in an inconsistent state
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