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From "Yi Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10300) Allowed deferred sending of call responses
Date Mon, 12 Oct 2015 08:06:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14952778#comment-14952778
] 

Yi Liu commented on HADOOP-10300:
---------------------------------

+1, thanks [~daryn]. 

> Allowed deferred sending of call responses
> ------------------------------------------
>
>                 Key: HADOOP-10300
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10300
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: ipc
>    Affects Versions: 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>              Labels: BB2015-05-TBR
>         Attachments: HADOOP-10300.patch, HADOOP-10300.patch, HADOOP-10300.patch
>
>
> RPC handlers currently do not return until the RPC call completes and response is sent,
or a partially sent response has been queued for the responder.  It would be useful for a
proxy method to notify the handler to not yet the send the call's response.
> An potential use case is a namespace handler in the NN might want to return before the
edit log is synced so it can service more requests and allow increased batching of edits per
sync.  Background syncing could later trigger the sending of the call response to the client.



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