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From "Chuan Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5483) revert MAPREDUCE-5357
Date Tue, 27 Aug 2013 18:46:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751570#comment-13751570
] 

Chuan Liu commented on MAPREDUCE-5483:
--------------------------------------

Who is the owner of the staging area directory? My original thought was that it is always
the user who submits jobs because we will enforce the ownership explicitly in another code
path (the if clause) of the same method. Thus chown() will always be a NOP; and the Windows
Administrators user case is the only exception. It seems my assumption was wrong from the
Ozzie test. However, this seems suggesting Ozzie test may also fail if you re-run the test
without deleting the staging directory.
                
> revert MAPREDUCE-5357
> ---------------------
>
>                 Key: MAPREDUCE-5483
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5483
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: distcp
>    Affects Versions: 2.1.0-beta
>            Reporter: Alejandro Abdelnur
>            Assignee: Robert Kanter
>             Fix For: 2.1.1-beta
>
>         Attachments: MAPREDUCE-5483.patch
>
>
> MAPREDUCE-5357 does a fileystem chown() operation. chown() is not valid unless you are
superuser. if you a chown() to yourself is a NOP, that is why has not been detected in Hadoop
testcases where user is running as itself. However, in distcp testcases run by Oozie which
use test users/groups from UGI for minicluster it is failing because of this chown() either
because the test user does not exist of because the current use does not have privileges to
do a chown().
> We should revert MAPREDUCE-5357. Windows should handle this with some conditional logic
used only when running in Windows.
> Opening a new JIRA and not reverting directly because MAPREDUCE-5357 went in 2.1.0-beta.

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