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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9683) Wrap IpcConnectionContext in RPC headers
Date Tue, 02 Jul 2013 07:41:20 GMT
Luke Lu created HADOOP-9683:

             Summary: 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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