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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10605) Manage the call timeout in the server
Date Mon, 18 Jan 2016 10:43:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15105088#comment-15105088
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Nicolas Liochon commented on HBASE-10605:
-----------------------------------------

Hi [~java8964], what do you need to know?
The point of this jira if that the server should not continue to handle a request if we know
that the client has already stopped waiting for the result.


> Manage the call timeout in the server
> -------------------------------------
>
>                 Key: HBASE-10605
>                 URL: https://issues.apache.org/jira/browse/HBASE-10605
>             Project: HBase
>          Issue Type: Improvement
>          Components: IPC/RPC, regionserver
>    Affects Versions: 0.99.0
>            Reporter: Nicolas Liochon
>            Assignee: Nicolas Liochon
>
> Since HBASE-10566, we have an explicit call timeout available in the client.
> We could forward it to the server, and use this information for:
> - if the call is still in the queue, just cancel it
> - if the call is under execution, makes this information available in RpcCallContext
(actually change the RpcCallContext#disconnectSince to something more generic), so it can
be used by the query under execution to stop its execution
> - in the future, interrupt it to manage the case 'stuck on a dead datanode' or something
similar
> - if the operation has finished, don't send the reply to the client, as by definition
the client is not interested anymore.
> From this, it will be easy to manage the cancellation: disconnect/timeout/cancellation
are similar from a service execution PoV



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