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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1041) RM to bind and notify a restarted AM of existing containers
Date Mon, 23 Sep 2013 13:32:15 GMT

    [ https://issues.apache.org/jira/browse/YARN-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13774539#comment-13774539

Steve Loughran commented on YARN-1041:

I'd add that discarding outstanding requests on AM restart would avoid the AM from having
the problem of handling container allocations which it was not expecting. After enumerating
the active set of containers, the AM could make its own decisions about how many containers
it needs -and where.
> RM to bind and notify a restarted AM of existing containers
> -----------------------------------------------------------
>                 Key: YARN-1041
>                 URL: https://issues.apache.org/jira/browse/YARN-1041
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 3.0.0
>            Reporter: Steve Loughran
> For long lived containers we don't want the AM to be a SPOF.
> When the RM restarts a (failed) AM, it should be given the list of containers it had
already been allocated. the AM should then be able to contact the NMs to get details on them.
NMs would also need to do any binding of the containers needed to handle a moved/restarted

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