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https://issues.apache.org/jira/browse/MAPREDUCE-2568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045527#comment-13045527
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Todd Lipcon commented on MAPREDUCE-2568:
----------------------------------------

actually, one question before commit: this test case has had this same ordering 
of arguments since it was introduced. It only started failing once we changed 
CommandFormat to only allow flags at the beginning. That indicates that the 
CommandFormat change was a compatibility-breaking change. Thoughts?

> Fix TestFileSystem
> ------------------
>
>                 Key: MAPREDUCE-2568
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2568
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.23.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: MAPREDUCE-2568.patch
>
>
> CommandFormat which is used to parse command lines is following posix 
> conventions of stopping at the first non-argument.  There is just one test in 
> this file which placed an option in the middle of the args.

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