[jira] [Commented] (MAPREDUCE-4601) Windows CMD processor doesn't use double quotes

["Ivan Mitic (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13443590#comment-13443590 ] 

Ivan Mitic commented on MAPREDUCE-4601:
---------------------------------------

Thanks for reporting this Owen!

Did not know that the CLASSPATH cannot handle double quotes from your example. Interestingly, we settled on adding double quotes on Windows in {{TaskRunner#run()}} and trimming them away on the child side. However, with the CLASSPATH this does not really work. Please check out MAPREDUCE-4374, it contains the relevant discussion.
                
> Windows CMD processor doesn't use double quotes
> -----------------------------------------------
>
>                 Key: MAPREDUCE-4601
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4601
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1-win
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>         Attachments: mr-4601.patch
>
>
> Currently, the task launch script under windows matches Linux and double quotes all of the values. Unfortunately, the Windows' CMD processor doesn't need and doesn't ignore the double quotes. The main symptom of this is that the CLASSPATH loses the first and last entries.
> {code}
> set CLASSPATH="c:\foo;c:\bar;c:\baz"
> {code}
> results in having '"c:\foo' 'c:\bar' and 'c:\baz"' on the classpath. Of those three, only the 'c:\bar' is valid. 

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