In Hadoop Pipes, reduce tasks with no shuffled data input can time out in the 
close method even when progress is sent
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                 Key: MAPREDUCE-2071
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2071
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: pipes
    Affects Versions: 0.21.0, 0.20.2, 0.20.1
            Reporter: Christian Kunz


Likely has to do with the fact that PipesReducer starts the application with a 
Null reporter in the close method.

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