ChainReducer uses MAPPER_BY_VALUE instead of REDUCER_BY_VALUE
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                 Key: HADOOP-7280
                 URL: https://issues.apache.org/jira/browse/HADOOP-7280
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Forrest Vines
            Priority: Minor


On line 293 of o.a.h.mapred.lib.Chain in setReducer(...):

reducerConf.setBoolean(MAPPER_BY_VALUE, byValue);

this should be REDUCER_BY_VALUE.

http://grepcode.com/file/repository.cloudera.com/content/repositories/releases/com.cloudera.hadoop/hadoop-core/0.20.2-737/org/apache/hadoop/mapred/lib/Chain.java#293

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