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https://issues.apache.org/jira/browse/HADOOP-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Phillips updated HADOOP-4377:
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    Attachment:     (was: hadoop-s3n-tmpdir.patch)

> 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
>         Attachments: 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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