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https://issues.apache.org/jira/browse/HADOOP-16775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amir Shenavandeh updated HADOOP-16775:
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Attachment: patch.txt
> Hadoop DistCp reuses the same temp file within the task for different files.
> ----------------------------------------------------------------------------
>
> Key: HADOOP-16775
> URL: https://issues.apache.org/jira/browse/HADOOP-16775
> Project: Hadoop Common
> Issue Type: Improvement
> Components: tools/distcp
> Affects Versions: 2.0
> Reporter: Amir Shenavandeh
> Priority: Major
> Attachments: patch.txt
>
>
> Hadoop DistCp reuses the same temp file name for all the files copied within
> each task attempt and then moves them to the target name, which also a server
> side copy. For copies over S3 this will cause inconsistency as S3 is only
> consistent for read after writes, for brand new objects. There is also
> inconsistency for contents of overwritten objects on S3.
> To avoid this, we should randomize the temp file name.
>
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