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From "bc Wong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5862) Line records longer than 2x split size aren't handled correctly
Date Sun, 27 Apr 2014 01:03:39 GMT
bc Wong created MAPREDUCE-5862:
----------------------------------

             Summary: Line records longer than 2x split size aren't handled correctly
                 Key: MAPREDUCE-5862
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5862
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 2.3.0
            Reporter: bc Wong
            Assignee: bc Wong


Suppose this split (100-200) is in the middle of a record (90-240):

{noformat}
   0              100            200             300
   |---- split ----|---- curr ----|---- split ----|
                 <------- record ------->
                 90                     240
{noformat}
      
Currently, the first split would read the entire record, up to offset 240, which is good.
But the 2nd split has a bug in producing a phantom record of (200, 240).
We don't want to end up creating a phantom record of (200-240).



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