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From "Sanjay Radia (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4260) Use JobObject to spawn tasks on Windows
Date Sat, 16 Jun 2012 00:31:42 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sanjay Radia updated MAPREDUCE-4260:
------------------------------------

    Summary: Use JobObject to spawn tasks on Windows  (was: Investigate use of JobObject to
spawn tasks on Windows)
    
> Use JobObject to spawn tasks on Windows
> ---------------------------------------
>
>                 Key: MAPREDUCE-4260
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4260
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 1.0.0
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>         Attachments: MAPREDUCE-4260.branch-1-win.1.patch, MAPREDUCE-4260.branch-1-win.2.patch,
MAPREDUCE-4260.branch-1-win.patch, MAPREDUCE-4260.patch, test.cpp
>
>
> Currently, the Windows version spawns the task as a normal cmd shell from which other
downstream exe's are spawned. However, this is not bullet proof because if an intermediate
process exits before its child exits, then the parent child process tree relationship cannot
be constructed. Windows has a concept of JobObject that is similar to the setsid behavior
used in Linux. The initial spawned task could be launched within its JobObject. Thereafter,
process termination, memory management etc could be operated on the JobObject.

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