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https://issues.apache.org/jira/browse/KAFKA-3189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15129685#comment-15129685
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Grant Henke commented on KAFKA-3189:
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[~becket_qin] [~ijuma] I updated the jira description to match the exact
scenario. I will open a PR shortly.
> Kafka server returns UnknownServerException for inherited exceptions
> --------------------------------------------------------------------
>
> Key: KAFKA-3189
> URL: https://issues.apache.org/jira/browse/KAFKA-3189
> Project: Kafka
> Issue Type: Bug
> Components: core
> Reporter: Jiangjie Qin
> Assignee: Grant Henke
> Fix For: 0.9.1.0
>
>
> This issue was introduced in KAFKA-2929. The problem is that we are using
> o.a.k.common.protocol.Errors.forException() while some exceptions thrown by
> the broker are still using old scala exception. This cause
> Errors.forException() always return UnknownServerException.
> InvalidMessageException is inherited from CorruptRecordException. But it
> seems Errors.forException() needs the exception class to be the exact class,
> so it does not map the subclass InvalidMessageException to the correct error
> code. Instead it returns -1 which is UnknownServerException.
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