https://hadoop.apache.org/docs/r1.2.1/api/org/apache/hadoop/mapreduce/ReduceContext.ValueIterator.html
ReduceContext.ValueIterator (Hadoop 1.2.1 API)
hadoopapi
https://hadoop.apache.org/docs/r1.2.1/api/org/apache/hadoop/mapreduce/ReduceContext.html
ReduceContext (Hadoop 1.2.1 API)
hadoopapi
https://hadoop.apache.org/docs/r1.2.1/api/org/apache/hadoop/mapreduce/ReduceContext.ValueIterable.html
ReduceContext.ValueIterable (Hadoop 1.2.1 API)
hadoopapi