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https://issues.apache.org/jira/browse/HADOOP-3788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630072#action_12630072
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Alex Loddengaard commented on HADOOP-3788:
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Tom, thanks for correcting my JIRA misuse.
PBs do not provide a mechanism to limit the amount of data read from a stream,
so your solution of breaking key, value pairs into two streams is the approach
we should take. I'll make this change.
As for your other comments, I included the *Tracker classes and
TestPBHadoopStreams to prove that streams have extra binary data. I was
planning on removing these classes once it was widely understood that the
streams had extra data, but I'll keep them around and modify them appropriately.
Good idea on keeping a single Builder instance per deserializer. That's a much
better solution.
I'll get working on this and submit a patch. Thanks again, Tom!
> 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, 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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