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https://issues.apache.org/jira/browse/HADOOP-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12646000#action_12646000
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Hudson commented on HADOOP-4377:
--------------------------------
Integrated in Hadoop-trunk #655 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/655/])
. Fix a race condition in directory creation in
NativeS3FileSystem. Contributed by David Phillips.
> Race condition creating S3 buffer directory for NativeS3FileSystem
> ------------------------------------------------------------------
>
> Key: HADOOP-4377
> URL: https://issues.apache.org/jira/browse/HADOOP-4377
> Project: Hadoop Core
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 0.18.1
> Reporter: David Phillips
> Assignee: David Phillips
> Fix For: 0.20.0
>
> Attachments: hadoop-s3n-tmpdir.patch, hadoop-s3n-tmpdir.patch
>
>
> The buffer directory is checked for existence, then created if it doesn't
> exist. But the create can fail if the another process creates it in between.
> We can fix this by checking for existence again if the create fails. I've
> seen "Cannot create S3 buffer directory" occur, and this race is the most
> plausible explanation.
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