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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4582) [MAPREDUCE-3902] ScheduledRequests#remove should remove the elements from mapsHostMapping and mapsRackMapping
Date Tue, 28 Aug 2012 18:36:07 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siddharth Seth updated MAPREDUCE-4582:
--------------------------------------

            Priority: Minor  (was: Major)
    Target Version/s: MR-3902
             Summary: [MAPREDUCE-3902] ScheduledRequests#remove should remove the elements
from mapsHostMapping and mapsRackMapping  (was: ScheduledRequests#remove should remove the
elements from mapsHostMapping and mapsRackMapping)

Tsuyoshi, the removal would be a little more efficient by using attemptToLaunchRequestMap.
That contains a list of hosts / racks for an attemptId. It's also not required for reduce
attempts.
assignToMap was originally written to take care of stale entries in these maps.
                
> [MAPREDUCE-3902] ScheduledRequests#remove should remove the elements from mapsHostMapping
and mapsRackMapping
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4582
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4582
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>    Affects Versions: MR-3902
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>            Priority: Minor
>         Attachments: MAPREDUCE-4582.patch
>
>
> ScheduledRequests#remove only remove the specified TaskAttemptId from "maps".
> It's inefficient, and the method should remove the elements from mapsHostMapping and
mapsRackMapping.

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