[jira] [Commented] (KAFKA-13783) Remove reason prefixing in JoinGroupRequest and LeaveGroupRequest

["Tom Bentley (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-13783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17515805#comment-17515805 ] 

Tom Bentley commented on KAFKA-13783:
-------------------------------------

[~dajac] do you want to update the KIP?

> Remove reason prefixing in JoinGroupRequest and LeaveGroupRequest
> -----------------------------------------------------------------
>
>                 Key: KAFKA-13783
>                 URL: https://issues.apache.org/jira/browse/KAFKA-13783
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: David Jacot
>            Assignee: David Jacot
>            Priority: Blocker
>             Fix For: 3.2.0
>
>
> KIP-800 introduced a mechanism to pass a reason in the join group request and in the leaver group request. A default reason is used unless one is provided by the user. In this case, the custom reason is prefixed by the default one.
> When we tried to used this in Kafka Streams, we noted a significant degradation of the performances, see https://github.com/apache/kafka/pull/11873. It is not clear wether the prefixing is the root cause of the issue or not. To be on the safe side, I think that we should remove the prefixing. It does not bring much anyway as we are still able to distinguish a custom reason from the default one on the broker side.



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