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https://issues.apache.org/jira/browse/HADOOP-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12964870#action_12964870
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Owen O'Malley commented on HADOOP-6685:
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<quote>
Was this the feedback I gave on MAPREDUCE-1462 back in February? I haven't
given any feedback offline for this issue.
<quote>
I thought we went through the APIs offline after that.
<quote>
The original work for Thrift and Protocol Buffers serializations (MAPREDUCE-376
and MAPREDUCE-377) was as contrib modules, so if we want to change that
approach, then we need to get consensus on doing so.
<quote>
Neither of those was ever committed, but of course we need consensus to
continue.
<quote>
Serializations in this form are easy to use by the way: users just add the
relevant contrib jar and the serialization jar to the job, just like any other
dependency.
<quote>
It is far more efficient to use the distributed cache to distribute the jars
than bundling them up into the user's jar that has to be downloaded each time.
> 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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