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From "Zhong Wang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1225) TT successfully localizes a task even though the corresponding cache-file has already changed on DFS.
Date Wed, 05 May 2010 03:42:03 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12864133#action_12864133
] 

Zhong Wang commented on MAPREDUCE-1225:
---------------------------------------

This patch has passed hudson test and people review for about half of a month. Should we commit
this to mapreduce trunk?

> TT successfully localizes a task even though the corresponding cache-file has already
changed on DFS.
> -----------------------------------------------------------------------------------------------------
>
>                 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, 0.22.0
>            Reporter: Vinod K V
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-1225.patch, MAPREDUCE-1225.patch, MAPREDUCE-1225.patch,
MAPREDUCE-1225.patch
>
>
> 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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