enabling BLOCK compression for map outputs breaks the reduce progress counters
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                 Key: HADOOP-3131
                 URL: https://issues.apache.org/jira/browse/HADOOP-3131
             Project: Hadoop Core
          Issue Type: Bug
    Affects Versions: 0.16.1
            Reporter: Colin Evans


Enabling map output compression and setting the compression type to BLOCK 
causes the progress counters during the reduce to go crazy and report progress 
counts over 100%.

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