Ivan Balashov created MAPREDUCE-5849:
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Summary: ReduceContextImpl.ValueIterable can only be iterated once
Key: MAPREDUCE-5849
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5849
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 2.3.0
Reporter: Ivan Balashov
Priority: Minor
Since ValueIterable reuses same iterator object it cannot be iterated more than
once. This behaviour is counter-intuitive (with regards to Iterable usage) and
thus difficult to spot.
Unless there are particular performance concerns, new instance of Iterator
should be returned.
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