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https://issues.apache.org/jira/browse/KAFKA-10802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17243273#comment-17243273
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Gary Russell commented on KAFKA-10802:
--------------------------------------
Also
>I am not sure I understand why it's logged at INFO at all, since it's a normal
>state during initial handshaking.
Consider reducing it to DEBUG (when the exception is MemberIdRequiredException)?
> Spurious log message when starting consumers
> --------------------------------------------
>
> Key: KAFKA-10802
> URL: https://issues.apache.org/jira/browse/KAFKA-10802
> Project: Kafka
> Issue Type: Improvement
> Affects Versions: 2.6.0
> Reporter: Mickael Maison
> Priority: Major
>
> Reported by Gary Russell in the [2.6.1 RC3 vote
> thread|https://lists.apache.org/thread.html/r13d2c687b2fafbe9907fceb3d4f3cc6d5b34f9f36a7fcc985c38b506%40%3Cdev.kafka.apache.org%3E]
> I am seeing this on every consumer start:
> 2020-11-25 13:54:34.858 INFO 42250 --- [ntainer#0-0-C-1]
> o.a.k.c.c.internals.AbstractCoordinator : [Consumer
> clientId=consumer-ktest26int-1, groupId=ktest26int] Rebalance failed.
> org.apache.kafka.common.errors.MemberIdRequiredException: The group member
> needs to have a valid member id before actually entering a consumer group.
> Due to this change
> https://github.com/apache/kafka/commit/16ec1793d53700623c9cb43e711f585aafd44dd4#diff-15efe9b844f78b686393b6c2e2ad61306c3473225742caed05c7edab9a138832R468
> I understand what a MemberIdRequiredException is, but the previous (2.6.0)
> log (with exception.getMessage()) didn't stand out like the new one does
> because it was all on one line.
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