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https://issues.apache.org/jira/browse/KAFKA-18201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17904664#comment-17904664
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Lianet Magrans commented on KAFKA-18201:
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Sure, thanks! For more context, I found this while testing the attempt to make
the new consumer the default one, on this PR
[https://github.com/apache/kafka/pull/18121]
> testGroupMetadataMessageFormatter fails for new consumer protocol
> -----------------------------------------------------------------
>
> Key: KAFKA-18201
> URL: https://issues.apache.org/jira/browse/KAFKA-18201
> Project: Kafka
> Issue Type: Bug
> Reporter: Lianet Magrans
> Priority: Major
>
> This fails when the new protocol/consumer are used, with
> java.lang.NullPointerException: Cannot invoke
> "com.fasterxml.jackson.databind.JsonNode.get(String)" because "keyNode" is
> null
> Not sure if it's a bug that needs fixing or if the test needs to be updated
> to successfully run with group.protocol=CONSUMER
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