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https://issues.apache.org/jira/browse/HADOOP-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126122#comment-13126122
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Sanjay Radia commented on HADOOP-7557:
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I personally prefer to use PB for protocols - so i agree with you Todd.
My main motivation for pluggability is for transitions across fundamental
protocol changes. Once we go to PB I doubt if we will need change unless we
find a flaw. Pluggability does provide an option for inter-operating with 20.
I feel that adding a field to "hrpc" header mentioned in my previous comment
allows Hadoop RPC library to be used by *other* projects with a different
serialization; I understood this to be one of Doug's motivation. From a pure
protocol layering point of view having a field for the protocol at the next
layer does make sense.
> Make IPC header be extensible
> -------------------------------
>
> Key: HADOOP-7557
> URL: https://issues.apache.org/jira/browse/HADOOP-7557
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Sanjay Radia
> Assignee: Sanjay Radia
> Attachments: HADOOP-7557.patch, IpcHeader.proto, ipcHeader1.patch,
> ipcHeader2.patch
>
>
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