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https://issues.apache.org/jira/browse/KAFKA-14439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17642735#comment-17642735
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Ismael Juma commented on KAFKA-14439:
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I think it would also be useful for the server to indicate whether an error is
retriable or not. That would make protocol evolution a lot more flexible.
> Specify returned errors for various APIs and versions
> -----------------------------------------------------
>
> Key: KAFKA-14439
> URL: https://issues.apache.org/jira/browse/KAFKA-14439
> Project: Kafka
> Issue Type: Task
> Reporter: Justine Olshan
> Priority: Major
>
> Kafka is known for supporting various clients and being compatible across
> different versions. But one thing that is a bit unclear is what errors each
> response can send.
> Knowing what errors can come from each version helps those who implement
> clients have a more defined spec for what errors they need to handle. When
> new errors are added, it is clearer to the clients that changes need to be
> made.
> It also helps contributors get a better understanding about how clients are
> expected to react and potentially find and prevent gaps like the one found in
> https://issues.apache.org/jira/browse/KAFKA-14417
> I briefly synced offline with [~hachikuji] about this and he suggested maybe
> adding values for the error codes in the schema definitions of APIs that
> specify the error codes and what versions they are returned on. One idea was
> creating some enum type to accomplish this.
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