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https://issues.apache.org/jira/browse/HADOOP-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932734#action_12932734
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Owen O'Malley commented on HADOOP-6685:
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{quote}
So users don't care about the version numbers for these libraries.
{quote}
That doesn't follow. In each application there can only be one instance of
Thrift, Avro, or ProtocolBuffers. How the library is used doesn't matter.
{quote}
The case I'm thinking about here is if a user has a Thrift file definition that
uses a feature of a later version of Thrift than is included in Hadoop then
they can't use it.
{quote}
The user can always choose to not import the dependence from Hadoop. But they
should make that choice explicitly, because if they override the version *they*
need to make sure that both Hadoop and their application work with the version
they choose.
> 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, 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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