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