[jira] Created: (MAPREDUCE-1225) TT successfully localizes a task even though the corresponding cache-file has already changed on DFS.

["Vinod K V (JIRA)" <ji...@apache.org>]

TT successfully localizes a task even though the corresponding cache-file has already changed on DFS.
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                 Key: MAPREDUCE-1225
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1225
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: tasktracker
    Affects Versions: 0.21.0
            Reporter: Vinod K V
             Fix For: 0.21.0


This happens with the first task of a job being localized on this TT. TT doesn't check if the file on DFS is fresh according to the timestamps set in job-conf during submission. After the first task incorrectly gets localized, all further tasks fail on this TT as expected.

Found this issue while trying to improve test-case for MAPREUCE-913.

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