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https://issues.apache.org/jira/browse/KAFKA-3536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15332767#comment-15332767
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Jason Rosenberg commented on KAFKA-3536:
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which version are you seeing this in (I'm seeing it just now in 0.8.2.2), after 
a server restart....

> ReplicaFetcherThread should not log errors when leadership changes
> ------------------------------------------------------------------
>
>                 Key: KAFKA-3536
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3536
>             Project: Kafka
>          Issue Type: Improvement
>          Components: core
>            Reporter: Stig Rohde Døssing
>            Priority: Minor
>
> When there is a leadership change, ReplicaFetcherThread will spam the log 
> with errors similar to the log snippet below.
> {noformat}
> [ReplicaFetcherThread-0-2], Error for partition [ticketupdate,7] to broker 
> 2:class kafka.common.NotLeaderForPartitionException 
> (kafka.server.ReplicaFetcherThread)
> {noformat}
> ReplicaFetcherThread/AbstractFetcherThread should log those exceptions at a 
> lower log level, since they don't actually indicate an error.



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