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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9683) Wrap IpcConnectionContext in RPC headers
Date Mon, 15 Jul 2013 15:54:52 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13708570#comment-13708570
] 

Suresh Srinivas commented on HADOOP-9683:
-----------------------------------------

Sorry I have not completed the review. +1 for committing it and follow up Jira to address
any comments from Sanjay. 




                
> Wrap IpcConnectionContext in RPC headers
> ----------------------------------------
>
>                 Key: HADOOP-9683
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9683
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: ipc
>            Reporter: Luke Lu
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: HADOOP-9683.patch
>
>
> After HADOOP-9421, all RPC exchanges (including SASL) are wrapped in RPC headers except
IpcConnectionContext, which is still raw protobuf, which makes request pipelining (a desirable
feature for things like HDFS-2856) impossible to achieve in a backward compatible way. Let's
finish the job and wrap IpcConnectionContext with the RPC request header with the call id
of SET_IPC_CONNECTION_CONTEXT. Or simply make it an optional field in the RPC request header
that gets set for the first RPC call of a given stream.

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