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https://issues.apache.org/jira/browse/MAPREDUCE-2659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13063890#comment-13063890
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Robert Joseph Evans commented on MAPREDUCE-2659:
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If you don't want it for 0.23 that is fine it can wait. I have quite a bit
done already, so I will clean up what I have and submit the patch so it is at
least a place holder for who ever picks it up later. However, this is
something that is required to be able claim a maintainable wire compatibility.
It makes no sense to replace a serialization protocol because of serious short
comings in it so that we can have wire compatibility, but then insert parts of
that old protocol hidden in the new one.
> MR-279: ShuffleHandler should use Protocol Buffers for ServiceData
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-2659
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2659
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Fix For: 0.23.0
>
>
> Auxiliary Services (Specifically ShuffleHandler) should use ProtocolBuffers
> for storing/retrieving data in the ByteBuffer. Right now there are TODOs to
> have the format include a version number, but if we want true wire
> compatibility we should use the same system we are using elsewhere in the
> code for messages, not something invented as we go along.
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