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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