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https://issues.apache.org/jira/browse/HADOOP-2834?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley updated HADOOP-2834:
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    Status: Open  (was: Patch Available)

I'm sorry, but you've got a few accidental white space diffs.

I also think it would be a very good idea if your Reader.next validated that 
the types of the key and value that were passed in matched the types in the 
sequence file. Otherwise, the user can accidentally cross the streams and get 
random data corruption and run time errors.

> Iterator for MapFileOutputFormat
> --------------------------------
>
>                 Key: HADOOP-2834
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2834
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.17.0
>            Reporter: Andrzej Bialecki 
>            Assignee: Andrzej Bialecki 
>         Attachments: map-file-v2.patch, map-file-v3.patch, map-file-v4.patch
>
>
> MapFileOutputFormat produces output data that is sorted locally in each 
> part-NNNNN file - however, there is no easy way to iterate over keys from all 
> parts in a globally ascending order.

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