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https://issues.apache.org/jira/browse/KAFKA-5118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15982151#comment-15982151
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Dustin Cote commented on KAFKA-5118:
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[~huxi] ^
> Improve message for Kafka failed startup with non-Kafka data in data.dirs
> -------------------------------------------------------------------------
>
> Key: KAFKA-5118
> URL: https://issues.apache.org/jira/browse/KAFKA-5118
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 0.10.2.0
> Reporter: Dustin Cote
> Priority: Minor
>
> Today, if you try to startup a broker with some non-Kafka data in the
> data.dirs you end up with a cryptic message:
> {code}
> [2017-04-21 13:35:08,122] ERROR There was an error in one of the threads
> during logs loading: java.lang.StringIndexOutOfBoundsException: String index
> out of range: -1 (kafka.log.LogManager)
> [2017-04-21 13:35:08,124] FATAL [Kafka Server 3], Fatal error during
> KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer)
> java.lang.StringIndexOutOfBoundsException: String index out of range: -1
> {code}
> It'd be better if we could tell the user to look for non-Kafka data in the
> data.dirs and print out the offending directory that caused the problem in
> the first place.
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