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https://issues.apache.org/jira/browse/SPARK-13245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15139475#comment-15139475
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Apache Spark commented on SPARK-13245:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/11138
> ShuffleBlockFetcherIterator should not use shuffleMetrics in multiple threads
> -----------------------------------------------------------------------------
>
> Key: SPARK-13245
> URL: https://issues.apache.org/jira/browse/SPARK-13245
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: Shixiong Zhu
>
> In ShuffleBlockFetcherIterator, shuffleMetrics is called in
> BlockFetchingListener.onBlockFetchSuccess which will be called in multiple
> threads, but shuffleMetrics is not thread safe.
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