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https://issues.apache.org/jira/browse/KAFKA-5820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16157717#comment-16157717
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Guozhang Wang commented on KAFKA-5820:
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[~tedyu] Just reviewed.
> Remove unneeded synchronized keyword in StreamThread
> ----------------------------------------------------
>
> Key: KAFKA-5820
> URL: https://issues.apache.org/jira/browse/KAFKA-5820
> Project: Kafka
> Issue Type: Improvement
> Reporter: Ted Yu
> Priority: Minor
>
> There are three methods in StreamThread which have unnecessary synchronized
> keyword since the variable accessed, state, is volatile :
> isRunningAndNotRebalancing
> isRunning
> shutdown
> synchronized keyword can be dropped for these methods.
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