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https://issues.apache.org/jira/browse/MAPREDUCE-4888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli reassigned MAPREDUCE-4888:
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Assignee: Vinod Kumar Vavilapalli
Bobby, taking this over. Thanks for your analysis and the test-case, it made my
job easier.
> NLineInputFormat drops data in 1.1 and beyond
> ---------------------------------------------
>
> Key: MAPREDUCE-4888
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4888
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv1
> Affects Versions: 1.1.0
> Reporter: Robert Joseph Evans
> Assignee: Vinod Kumar Vavilapalli
> Priority: Blocker
> Attachments: test.patch
>
>
> When trying to root cause why MAPREDUCE-4782 did not cause us issues on
> 1.0.2, I found out that HADOOP-7823 introduced essentially the exact same
> error into org.apache.hadoop.mapred.lib.NLineInputFormat.
> In 1.X org.apache.hadoop.mapred.lib.NLineInputFormat and
> org.apache.hadoop.mapreduce.lib.input.NLineInputFormat are separate
> implementations. The latter had an off by one error in it until
> MAPREDUCE-4782 fixed it. The former had no error in it until HADOOP-7823
> introduced it in 1.1 and MAPREDUCE-375 combined the implementations together
> but picked the implementation with the off by one error in 0.21.
> I will attach a patch that exposes the error.
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