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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2492) [MAPREDUCE] The new MapReduce API should make available task's progress to the task
Date Mon, 23 May 2011 18:56:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038134#comment-13038134
] 

Tom White commented on MAPREDUCE-2492:
--------------------------------------

> I think it makes sense to have Reporter provide the task's progress to the map/reduce
task attempts. I would prefer marking this change as incompatible.

It's certainly an improvement, but does it warrant an incompatible change to an interface
marked as stable? There may be an argument that it does, but I would have expected to see
some discussion about this before it was committed. Why not only change the new API and tell
users that they need to use that one if they want to use this feature?

> [MAPREDUCE] The new MapReduce API should make available task's progress to the task
> -----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2492
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2492
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: task
>    Affects Versions: 0.23.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-2492-v1.3.patch, MAPREDUCE-2492-v1.4.patch, MAPREDUCE-2492-v1.5.patch,
MAPREDUCE-2492-v1.6.patch, MAPREDUCE-2492-v1.7.patch
>
>
> There is no way to get the task's current progress in the new MapReduce API. It would
be nice to make it available so that the task (map/reduce) can use it. 

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