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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1090) In SortValidator, the check for whether a file belongs to sort-input or sort-output dir is weak
Date Thu, 08 Mar 2007 13:02:24 GMT
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
            Reporter: Devaraj Das
         Assigned To: Arun C Murthy


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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