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From "Vinod Kumar Vavilapalli (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3399) ContainerLocalizer should request new resources after completing the current one
Date Tue, 27 Dec 2011 18:30:30 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinod Kumar Vavilapalli updated MAPREDUCE-3399:
-----------------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.23.1
     Release Note: Modified ContainerLocalizer to send a heartbeat to NM immediately after
downloading a resource instead of always waiting for a second.
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

I just committed this to trunk and merged into branch-0.23. Thanks Sid!
                
> ContainerLocalizer should request new resources after completing the current one
> --------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3399
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3399
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2, nodemanager
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>            Priority: Blocker
>             Fix For: 0.23.1
>
>         Attachments: MR3399_v1.txt, MR3399_v2.txt
>
>
> Currently, the ContainerLocalizer to NM heartbeats to the NM every second. Not very significant,
but this causes a ~4second delay in jobs (job jar, splits, etc). Instead, it should heartbeat
to ask for additional resources to localize as soon as the previous one is localzied. There's
already a TODO in the ContainerLocalizer for this.

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