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https://issues.apache.org/jira/browse/MAPREDUCE-3598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175904#comment-13175904
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Subroto Sanyal commented on MAPREDUCE-3598:
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Hi Liyin,
Seems MAPREDUCE-3376 is same as this one. Can you take a look please?
> 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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