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From "Sanjay Radia (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7557) Make IPC header be extensible
Date Wed, 12 Oct 2011 21:59:11 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126195#comment-13126195

Sanjay Radia commented on HADOOP-7557:

> This is not a user extension point....
> ... like security that's used by all message encodings, why not use an encoding-independent
format in the header? ...

Essentially you are arguing that  IpcHeader does not need to be extensible and that *essentially*
we should merge the "hrpc" header and the ipcHeader. I do believe it is missing the "protocolKind"
field since there are 3 existing protocols (3 rpc engines) at the next layer. Hence if the
header *had* been extensible in the past we would have been able to add the field easily in
a backward compatible fashion.
> 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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