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https://issues.apache.org/jira/browse/HADOOP-10934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brian Loss resolved HADOOP-10934.
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Resolution: Duplicate
It appears that MAPREDUCE-6199 fixes took care of this issue.
> AbstractCounters.readFields doesn't clear "other" groups
> --------------------------------------------------------
>
> Key: HADOOP-10934
> URL: https://issues.apache.org/jira/browse/HADOOP-10934
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.2.0, 2.3.0, 2.4.0, 2.4.1
> Reporter: Brian Loss
>
> The readFields method of AbstractCounters clears the "framework and fs
> groups" map {{fgroups}}, but does not clear the "other groups" map
> {{groups}}. If a Counters object is used as the key or value record reader,
> it will aggregate groups over all records rather than just returning the
> counters for the current record. In all likelihood, in addition to providing
> incorrect data, the counter limit will also be exceeded as it is checked each
> time through readFields.
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