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From "Harsh J (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3598) Old combiner doesn't support counter, progress
Date Mon, 26 Dec 2011 06:58:30 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175900#comment-13175900
] 

Harsh J commented on MAPREDUCE-3598:
------------------------------------

This should be fixed with MAPREDUCE-3376
                
> Old combiner doesn't support counter, progress
> ----------------------------------------------
>
>                 Key: MAPREDUCE-3598
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3598
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.205.0
>            Reporter: Liyin Liang
>            Priority: Blocker
>
> After HADOOP-5382, old combiner's reduce is invoked with Reporter.NULL. So all the features
in Reporter, e.g. counter, progress are not supported any more. The related code is as follows:
> {code:}
>         while (values.more()) {
>           combiner.reduce(values.getKey(), values, combineCollector,
>               Reporter.NULL);
>           values.nextKey();
>         }
> {code}

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