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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3041) Within a task, the value ofJobConf.getOutputPath() method is modified
Date Mon, 31 Mar 2008 19:00:26 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12583798#action_12583798
] 

Runping Qi commented on HADOOP-3041:
------------------------------------


I think it is better to removing the getOutputPath()  from the api and replace it with something
else.
That way, the application can detect the problem at compile time.
Otherwise, the apps will misbehave without any warnings.



> Within a task, the value ofJobConf.getOutputPath() method is modified
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-3041
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3041
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.16.1
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Assignee: Amareshwari Sriramadasu
>            Priority: Blocker
>             Fix For: 0.17.0
>
>         Attachments: patch-3041-0.16.2.txt, patch-3041.txt, patch-3041.txt, patch-3041.txt,
patch-3041.txt
>
>
> Until 0.16.0 the value of the getOutputPath() method, if queried within a task, pointed
to the part file assigned to the task. 
> For example: /user/foo/myoutput/part_00000
> In 0.16.1, now it returns an internal hadoop for the task output temporary location.
> For the above example: /user/foo/myoutput/_temporary/part_00000
> This change breaks applications that use the getOutputPath() to compute other directories.
> IMO, this has always being broken, Hadoop should not change the values of properties
injected by the client, instead it should use private properties or internal helper methods.


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