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https://issues.apache.org/jira/browse/KAFKA-10239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Boyang Chen resolved KAFKA-10239.
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Resolution: Fixed
> The groupInstanceId field in DescribeGroup response should be ignorable
> -----------------------------------------------------------------------
>
> Key: KAFKA-10239
> URL: https://issues.apache.org/jira/browse/KAFKA-10239
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.5.0, 2.4.1
> Reporter: Jason Gustafson
> Assignee: Boyang Chen
> Priority: Critical
> Fix For: 2.6.0, 2.4.2, 2.5.1
>
>
> We noticed the following error in the logs in the handling of a DescribeGroup
> request:
> ```
> org.apache.kafka.common.errors.UnsupportedVersionException: Attempted to
> write a non-default groupInstanceId at version 3
> ```
> The problem is that the field is not marked as ignorable. So if the user is
> relying on static membership and uses an older AdminClient, they will see
> this error.
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