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https://issues.apache.org/jira/browse/HADOOP-3788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630684#action_12630684
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Doug Cutting commented on HADOOP-3788:
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> T deserialize(T t, int length) throws IOException;
The serializer would have to know that it will be deserialized this way, so
that it knows not to include the length. So we'd need a different serialize()
method too.
> Add serialization for Protocol Buffers
> --------------------------------------
>
> Key: HADOOP-3788
> URL: https://issues.apache.org/jira/browse/HADOOP-3788
> Project: Hadoop Core
> Issue Type: Wish
> Components: examples, mapred
> Affects Versions: 0.19.0
> Reporter: Tom White
> Assignee: Alex Loddengaard
> Fix For: 0.19.0
>
> Attachments: hadoop-3788-v1.patch, hadoop-3788-v2.patch,
> protobuf-java-2.0.1.jar
>
>
> Protocol Buffers (http://code.google.com/p/protobuf/) are a way of encoding
> data in a compact binary format. This issue is to write a
> ProtocolBuffersSerialization to support using Protocol Buffers types in
> MapReduce programs, including an example program. This should probably go
> into contrib.
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