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https://issues.apache.org/jira/browse/HADOOP-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13120255#comment-13120255
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Doug Cutting commented on HADOOP-7557:
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I think PB provides little advantage here and complicates specification of a
wire protocol. I'd hope our long-term plan is to move towards a standard wire
protocol, either adopting an existing standard protocol or developing our own
interoperable, well-specified standard. The PB file attached is equivalent to
defining three string constant keys whose values are to be interpreted as
strings in RFC-822-style headers. Or these constants might be assigned numeric
values in the protocol specification, as they are in PB, although that might
complicate embedding this protocol in other standard protocols.
> Make IPC and RPC headers 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: IpcHeader.proto
>
>
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