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https://issues.apache.org/jira/browse/HADOOP-5450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated HADOOP-5450:
----------------------------------

    Fix Version/s: 1.0.2

Thanks Matt. I've committed to branch-1 after running tests.
                
> Add support for application-specific typecodes to typed bytes
> -------------------------------------------------------------
>
>                 Key: HADOOP-5450
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5450
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Klaas Bosteels
>            Assignee: Klaas Bosteels
>            Priority: Blocker
>             Fix For: 0.21.0, 1.0.2
>
>         Attachments: HADOOP-5450.patch
>
>
> For serializing objects of types that are not supported by typed bytes 
> serialization, applications might want to use a custom serialization format. 
> Right now, typecode 0 has to be used for the bytes resulting from this custom 
> serialization, which could lead to problems when deserializing the objects 
> because the application cannot know if a byte sequence following typecode 0 
> is a customly serialized object or just a raw sequence of bytes. Therefore, a 
> range of typecodes that are treated as aliases for 0 should be added, such 
> that different typecodes can be used for application-specific purposes.

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