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From "Chris Douglas (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 20:47:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038214#comment-13038214
] 

Chris Douglas commented on MAPREDUCE-2492:
------------------------------------------

This is partially my fault. I only had time for a quick pass over the patch, and had missed
the mapred API change among the updates to {{mapreduce.lib}} classes.

I agree with Tom. It's a useful feature, but changing only the new API is probably the better
course. Any breakage is unlikely- it's adding, not removing a method from a framework type
almost never implemented by users- but I'd lean away from any modifications to the old APIs
unless they affect correctness.

> [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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