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https://issues.apache.org/jira/browse/HADOOP-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935620#action_12935620
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Chris Douglas commented on HADOOP-6685:
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bq. The ASF would veto any release of Hadoop that depended on an unreleased 
in-incubation artifact. This would complicate any plan to branch to 0.22, or at 
least release it, unless the build file was set up to exclude thrift-specific 
code.

Thrift is a TLP: http://s.apache.org/e4f

> Change the generic serialization framework API to use serialization-specific 
> bytes instead of Map<String,String> for configuration
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6685
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6685
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>             Fix For: 0.22.0
>
>         Attachments: libthrift.jar, serial.patch, serial4.patch, 
> serial6.patch, serial7.patch, SerializationAtSummit.pdf
>
>
> Currently, the generic serialization framework uses Map<String,String> for 
> the serialization specific configuration. Since this data is really internal 
> to the specific serialization, I think we should change it to be an opaque 
> binary blob. This will simplify the interface for defining specific 
> serializations for different contexts (MAPREDUCE-1462). It will also move us 
> toward having serialized objects for Mappers, Reducers, etc (MAPREDUCE-1183).

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