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Posted to mapreduce-dev@hadoop.apache.org by "bc Wong (JIRA)" <ji...@apache.org> on 2014/04/27 03:03:39 UTC
[jira] [Created] (MAPREDUCE-5862) Line records longer than 2x split
size aren't handled correctly
bc Wong created MAPREDUCE-5862:
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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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