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https://issues.apache.org/jira/browse/SPARK-4764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14235525#comment-14235525
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Apache Spark commented on SPARK-4764:
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User 'preaudc' has created a pull request for this issue:
https://github.com/apache/spark/pull/2855
> Ensure that files are fetched atomically
> ----------------------------------------
>
> Key: SPARK-4764
> URL: https://issues.apache.org/jira/browse/SPARK-4764
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: Christophe PRÉAUD
> Priority: Minor
>
> It does not seem necessary in the doFetchFile method to first download the
> file into a local directory then move it (it may cause a copy instead of a
> rename).
> tempFile (where the file is downloaded) should be created in the same
> directory than targetFile, so that the move from tempFile to targetFile is
> always atomic
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