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https://issues.apache.org/jira/browse/KAFKA-13783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Jacot resolved KAFKA-13783.
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Resolution: Fixed
> 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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