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https://issues.apache.org/jira/browse/KAFKA-6475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349019#comment-16349019
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Xavier Léauté commented on KAFKA-6475:
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I was able to reproduce the problem by modifying the topic configuration
{{file.delete.delay.ms}} to an invalid string, e.g. {{abc123}}
This results in the following exception
{{org.apache.kafka.common.errors.UnknownServerException: Invalid value
94310fdaf43 for configuration file.delete.delay.ms: Not a number of type LONG}}
> ConfigException on the broker results in UnknownServerException in the admin
> client
> -----------------------------------------------------------------------------------
>
> Key: KAFKA-6475
> URL: https://issues.apache.org/jira/browse/KAFKA-6475
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 1.0.0
> Reporter: Xavier Léauté
> Assignee: Colin P. McCabe
> Priority: Minor
>
> Calling AdminClient.alterConfigs with an invalid configuration may cause
> ConfigException to be thrown on the broker side, which results in an
> UnknownServerException thrown by the admin client. It would probably make
> more sense for the admin client to throw InvalidConfigurationException in
> that case.
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