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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1523) Replace RMNotYetReadyException with the standard hadoop io StandbyException
Date Thu, 26 Dec 2013 20:59:50 GMT

    [ https://issues.apache.org/jira/browse/YARN-1523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13857071#comment-13857071

Karthik Kambatla commented on YARN-1523:

bq. Should we make the throwStandbyException() a method of HAUtil so that we could reuse it
in other places if need be?
Like the idea. Let us do it when we have another place that throws StandbyException. 

bq. When we want the standby RM to re-direct the client to the active RM then how do you think
we would do that?
The two options appear to be (1) notifying the client (through a derivate of StandbyException)
that we are not Active and that the Active is so-and-so (2) relaying the client request to
the Active RM and responding to the Client. The first approach might be simpler and have fewer
round-trips overall, particularly if there are only few kinds of clients.

Will commit this later today. 

> Replace RMNotYetReadyException with the standard hadoop io StandbyException
> ---------------------------------------------------------------------------
>                 Key: YARN-1523
>                 URL: https://issues.apache.org/jira/browse/YARN-1523
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>    Affects Versions: 2.4.0
>            Reporter: Bikas Saha
>            Assignee: Karthik Kambatla
>         Attachments: yarn-1523-1.patch

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