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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1226) makeQualified should return an instance of a DfsPath when passed a DfsPath
Date Wed, 23 May 2007 02:11:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12498078
] 

Arun C Murthy commented on HADOOP-1226:
---------------------------------------

<code>
  private Path getTaskOutputPath(JobConf conf) {
    return new Path(conf.getOutputPath(), ("_" + taskId));
  }
</code>

That is how taskOutputPath is created, and thus should be an absolute path. I'm not quite
sure, looking at TestMiniMRWithDFS.launchWordCount atleast, how this could result in a relative
path... not-fully-qualified maybe, but not relative.

Anyway, the short answer is making taskOutputPath fully-qualified shouldn't be a problem.

> Also, taskOutputPath stuff is reduce specific, so if anywhere, it belongs in ReduceTask,
no?
This also comes into play with 'reducer -NONE' where map outputs need to go directly to dfs...

Urelated note: +1 to moving that code from mapred kernel to the OutputFormatBase.

> makeQualified should return an instance of a DfsPath when passed  a DfsPath 
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-1226
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1226
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Koji Noguchi
>         Assigned To: dhruba borthakur
>             Fix For: 0.14.0
>
>         Attachments: makeQualified2.patch
>
>
> Currently, it returns a instance of a Path.

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