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From "Karam Singh (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4100) Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs
Date Tue, 03 Apr 2012 15:08:23 GMT
Sometimes gridmix emulates data larger much larger then acutal counter for map only jobs
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                 Key: MAPREDUCE-4100
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4100
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: contrib/gridmix
    Affects Versions: 1.1.0
            Reporter: Karam Singh
            Priority: Minor


While running 1400+ jobs trace I encountered this issue.
For map-only jobs, observed that some Maps generating data of around 9 GB (From HDFS_BYTES_WRITTEN)
whereas actual value is around 5GB in trace.
This can sometimes also cause jobs to fail intermittently.

Other GridMix version coming be Hadoop-1.1.X and above might also effected 

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