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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-915) For secure environments, the Map/Reduce debug script must be run as the user.
Date Tue, 17 Nov 2009 04:49:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778723#action_12778723

Vinod K V commented on MAPREDUCE-915:

bq. I can log the command lines that is written to taskjvm.sh. For the purpose of debugging,
that seems to make more sense than relying on the taskjvm.sh's contents.. I will upload a
patch soon.

I guess the advantage of using the same file is, well, less files to manage, and perhaps,
a bit of code-reuse.

I can't think of more uses for taskjvm.sh besides debugging. So +1 for the idea of logging
the commands to TT's log and use the same file for debug-script command too.

> For secure environments, the Map/Reduce debug script must be run as the user.
> -----------------------------------------------------------------------------
>                 Key: MAPREDUCE-915
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-915
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: security, tasktracker
>    Affects Versions: 0.21.0
>            Reporter: Hemanth Yamijala
>            Assignee: Devaraj Das
>            Priority: Blocker
>             Fix For: 0.21.0
>         Attachments: 915-4.patch, 915.1.patch, 915.2.patch, 915.patch
> The Taskcontroller model allows admins to set up a cluster configuration that runs tasks
as users. The debug script feature of Map/Reduce provided by the configuration options: mapred.map.task.debug.script
and mapred.reduce.task.debug.script need to be run as the user as well in such environments,
rather than as the tasktracker user.

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