[jira] Commented: (HADOOP-1090) In SortValidator, the check for whether a file belongs to sort-input or sort-output dir is weak

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-1090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12485985 ] 

Hadoop QA commented on HADOOP-1090:
-----------------------------------

Integrated in Hadoop-Nightly #45 (See http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/45/)

> In SortValidator, the check for whether a file belongs to sort-input or sort-output dir is weak
> -----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1090
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1090
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.12.2
>            Reporter: Devaraj Das
>         Assigned To: Arun C Murthy
>             Fix For: 0.13.0
>
>         Attachments: HADOOP-1090_20070331_1.patch
>
>
> In SortValidator, Maps invoke the method called deduceInputFile in the configure method. The deduceInputFile is supposed to return whether the input file belongs to the sort-input directory or the sort-output directory. However, the check that deduceInputFile does - inputFile.toString().startsWith(inputPaths[0].toString()) - is not totally correct. The check will always returns true for inputPaths like /user/foo/smallInput/<filenames>, /user/foo/smallInput-sorted/<filenames>. This finally causes the SortValidator to declare the sort output as incorrect.

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