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https://issues.apache.org/jira/browse/KAFKA-19057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Schofield resolved KAFKA-19057.
--------------------------------------
    Fix Version/s: 4.1.0
       Resolution: Fixed

> Stabilize KIP-932 Kafka protocol RPC definitions in AK 4.1
> ----------------------------------------------------------
>
>                 Key: KAFKA-19057
>                 URL: https://issues.apache.org/jira/browse/KAFKA-19057
>             Project: Kafka
>          Issue Type: Sub-task
>            Reporter: Andrew Schofield
>            Assignee: Andrew Schofield
>            Priority: Major
>             Fix For: 4.1.0
>
>
> The early access release of KIP-932 in Apache Kafka 4.0 used unstable APIs 
> because we wanted to retain the flexibility to evolve the design. Of the 12 
> RPCs in the KIP, ShareGroupHeartbeat, ShareGroupDescribe, ShareFetch and 
> ShareAcknowledge were exposed to consumer applications in AK 4.0. As 
> anticipated, testing has shown that cross-version connections cause problems, 
> in particular because ShareFetch has changed significantly and a 4.1 broker 
> receiving a 4.0 request cannot parse it and throws exceptions.
> These RPCs will be stabilised at v1, which will have the effect of preventing 
> 4.0 clients from using share groups with 4.1+ brokers, and preventing 4.1+ 
> clients form using share groups with 4.0 brokers. The remaining RPCs in 
> KIP-932 do not have any such concerns and will be stabilized at v0 in the 
> usual way.



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