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https://issues.apache.org/jira/browse/SPARK-6897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493800#comment-14493800
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Apache Spark commented on SPARK-6897:
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User 'zhichao-li' has created a pull request for this issue:
https://github.com/apache/spark/pull/5508
> Remove volatile from BlockingGenerator.currentBuffer
> ----------------------------------------------------
>
> Key: SPARK-6897
> URL: https://issues.apache.org/jira/browse/SPARK-6897
> Project: Spark
> Issue Type: Improvement
> Components: Streaming
> Reporter: zhichao-li
> Priority: Trivial
>
> It would introduce extra performance overhead if we double use volatile and
> synchronized to guard the same resource(BlockingGenerator.currentBuffer).
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