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From "Aaron T. Myers (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2712) add stdin to mapdebug and reducedebug scripts in streaming
Date Fri, 14 Oct 2011 06:02:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13127285#comment-13127285
] 

Aaron T. Myers commented on MAPREDUCE-2712:
-------------------------------------------

Hey Antonio, this seems like a reasonable proposal to me. Could you prepare a patch which
would implement this? If so, please provide a patch for trunk and optionally another patch
which can be applied to branch-0.20-security.
                
> add stdin to mapdebug and reducedebug scripts in streaming
> ----------------------------------------------------------
>
>                 Key: MAPREDUCE-2712
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2712
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/streaming
>    Affects Versions: 0.20.2
>            Reporter: Antonio Piccolboni
>
> The current syntax for the mapdebug and reducedebug scripts is $script $stdout $stderr
$syslog $jobconf, which seems appropriate for task failure post-analysis. But it seems more
than natural to want to inspect or analyze the input to see under what input the task failed,
up to rerunning the task say in debug mode or with other monitoring in place. So why not make
it $script $stdin $stdout $stderr $syslog $jobconf to complete the circle? See also https://issues.apache.org/jira/browse/MAPREDUCE-2076

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