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https://issues.apache.org/jira/browse/HADOOP-2528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12556111#action_12556111
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Raghu Angadi commented on HADOOP-2528:
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What if permissions checking is disabled (trunk currently allows it. it is in
fact the default)? I don't think client alone can decide if a particular access
is allowed, even if it is possible now. This looks similar to how DFS used to
invoke '{{exits(file)}}' before opening a file.
Also this results in external commands to be run for LocalFileSystem for each
file. Not that it is prohibitively expensive...
> check permissions for job inputs and outputs
> --------------------------------------------
>
> Key: HADOOP-2528
> URL: https://issues.apache.org/jira/browse/HADOOP-2528
> Project: Hadoop
> Issue Type: Improvement
> Components: mapred
> Reporter: Doug Cutting
> Fix For: 0.16.0
>
> Attachments: HADOOP-2528-0.patch
>
>
> On job submission, filesystem permissions should be checked to ensure that
> the input directory is readable and that the output directory is writable.
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