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https://issues.apache.org/jira/browse/MAPREDUCE-4203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13397063#comment-13397063
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Bikas Saha commented on MAPREDUCE-4203:
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ProcfsBasedProcessTree uses procs.getValue().updateAge(oldInfo) to update the 
age. updateAge() explicitly sets age = oldAge+1. So there is no double 
increment.

Ah.. sorry. I confused main() with Task(). There is no wrapper around 
SystemInfo() like Task(). Will add the error mesg.
                
> Create equivalent of ProcfsBasedProcessTree for Windows
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-4203
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4203
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>         Attachments: MAPREDUCE-4203.branch-1-win.1.patch, 
> MAPREDUCE-4203.branch-1-win.2.patch, MAPREDUCE-4203.patch, test.cpp
>
>
> ProcfsBasedProcessTree is used by the TaskTracker to get process information 
> like memory and cpu usage. This information is used to manage resources etc. 
> The current implementation is based on Linux procfs functionality and hence 
> does not work on other platforms, specifically windows.

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