Reduce memory usage of counters due to non-static nested classes
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                 Key: MAPREDUCE-4138
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4138
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
            Reporter: Tom White
            Assignee: Tom White


FrameworkCounter is a non-static nested class of FrameworkCounterGroup which means it retains a reference to the outer class, which isn't really needed.

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