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https://issues.apache.org/jira/browse/HADOOP-6129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Patterson updated HADOOP-6129:
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    Summary: MapFile doesn't work with serializables other than Writables  
(was: MapFile doesn't worh with serializables other than Writables)

> MapFile doesn't work with serializables other than Writables
> ------------------------------------------------------------
>
>                 Key: HADOOP-6129
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6129
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io, mapred
>    Affects Versions: 0.20.0
>            Reporter: Justin Patterson
>
> Since 0.18 (I think), SequenceFiles have supported serializing arbitrary 
> objects through the serialization framework.  MapFiles still don't.  They 
> require WritableComparable keys and Writable values.

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