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Posted to common-issues@hadoop.apache.org by "Suresh Srinivas (JIRA)" <ji...@apache.org> on 2013/07/02 21:43:21 UTC

[jira] [Commented] (HADOOP-9683) Wrap IpcConnectionContext in RPC headers

    [ https://issues.apache.org/jira/browse/HADOOP-9683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698138#comment-13698138 ] 

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

When is this going to be completed? Is this not coming too late for 2.1.0-beta?
                
> 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
>
> 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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