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https://issues.apache.org/jira/browse/KAFKA-14438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruno Cadonna resolved KAFKA-14438.
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Resolution: Fixed
> Throw error when consumer configured with empty/whitespace-only group.id for
> AsyncKafkaConsumer
> -----------------------------------------------------------------------------------------------
>
> Key: KAFKA-14438
> URL: https://issues.apache.org/jira/browse/KAFKA-14438
> Project: Kafka
> Issue Type: Task
> Components: consumer
> Reporter: Philip Nee
> Assignee: Bruno Cadonna
> Priority: Blocker
> Labels: kip-848-client-support, kip-848-e2e, kip-848-preview
> Fix For: 3.7.0
>
>
> Currently, a warning message is logged upon using an empty consumer groupId.
> In the next major release, we should drop the support of empty ("") consumer
> groupId.
> cc [~hachikuji]
> See
> [KIP-289|https://cwiki.apache.org/confluence/display/KAFKA/KIP-289%3A+Improve+the+default+group+id+behavior+in+KafkaConsumer]
> for more detail.
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