[jira] [Updated] (KAFKA-15282) Implement client support for KIP-848 client-side assignors

["Kirk True (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-15282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kirk True updated KAFKA-15282:
------------------------------
    Fix Version/s: 4.0.0
                       (was: 3.8.0)

> Implement client support for KIP-848 client-side assignors
> ----------------------------------------------------------
>
>                 Key: KAFKA-15282
>                 URL: https://issues.apache.org/jira/browse/KAFKA-15282
>             Project: Kafka
>          Issue Type: New Feature
>          Components: clients, consumer
>            Reporter: Kirk True
>            Priority: Major
>              Labels: kip-848, kip-848-client-support
>             Fix For: 4.0.0
>
>
> The client-side assignor provides the logic for the partition assignments instead of on the server. Client-side assignment is the main approach used by the “old protocol” for divvying up partitions. While the “new protocol” favors server-side assignors, the client-side assignor will continue to be used for backward compatibility, including KSQL, Connect, etc.
> Note: I _*think*_ that the client-side assignor logic and the reconciliation logic can remain separate from each other. We should strive to keep the two pieces unencumbered, unless it’s unavoidable.
> This task includes:
>  * Validate the client’s configuration for assignor selection
>  * Integrate with the new {{PartitionAssignor}} interface to invoke the logic from the user-provided assignor implementation
>  * Implement the necessary logic around the request/response from the {{ConsumerGroupPrepareAssignment}} RPC call using the information from the {{PartitionAssignor}} above
>  * Implement the necessary logic around the request/response from the {{ConsumerGroupInstallAssignment}} RPC call, again using the information calculated by the {{PartitionAssignor}}
> This task is part of the work to implement support for the new KIP-848 consumer group protocol.



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