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https://issues.apache.org/jira/browse/KAFKA-5011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15961626#comment-15961626
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Jun Rao commented on KAFKA-5011:
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Yes, this seems to be an issue. However, for this to happen, the leader has to
change in the small window of the config change delay, right? This seems rare.
We are actually aware of this symptom when discussing the upgrade path in EOS.
This symptom actually makes upgrading to EOS a bit easier since you don't have
to worry about the case where the leader can take the new message format but
the message gets down converted to the follower (which causes some of the EOS
metadata fields to be lost). Fixing this symptom potentially means that we may
need to rethink how EOS handles upgrade.
> Replica fetchers may need to down-convert messages during a selective message
> format upgrade
> --------------------------------------------------------------------------------------------
>
> Key: KAFKA-5011
> URL: https://issues.apache.org/jira/browse/KAFKA-5011
> Project: Kafka
> Issue Type: Bug
> Reporter: Joel Koshy
> Assignee: Jiangjie Qin
> Fix For: 0.11.0.0
>
>
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