[Gridmix] GenerateDistCacheData job of Gridmix can become slow in some cases
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                 Key: MAPREDUCE-4087
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4087
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Ravi Gummadi
            Assignee: Ravi Gummadi


In map() method of GenerateDistCacheData job of Gridmix, val.setSize() is done 
every time based on the bytes to be written to a distributed cache file. When 
we try to write data to next distributed cache file in the same map task, the 
size of random data generated in each iteration can become small based on the 
particular case. This can make this dist cache data generation slow.

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