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https://issues.apache.org/jira/browse/SPARK-15246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15277672#comment-15277672
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Apache Spark commented on SPARK-15246:
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User 'lianhuiwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/13020
> Fix code style and improve volatile for SPARK-4452
> ---------------------------------------------------
>
> Key: SPARK-15246
> URL: https://issues.apache.org/jira/browse/SPARK-15246
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.0.0
> Reporter: Lianhui Wang
>
> for SPARK-4452
> 1. Fix code style
> 2. remote volatile of elementsRead method because there is only one thread to
> use it.
> 3. avoid volatile of _elementsRead because Collection increases number of
> _elementsRead when it insert a element. It is very expensive. So we can avoid
> it.
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