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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-562) NM should reject containers allocated by previous RM
Date Tue, 16 Apr 2013 19:11:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633215#comment-13633215
] 

Jian He commented on YARN-562:
------------------------------

cluster_timestamp here is merely the time recorded when RM starts, not a vector clock. All
containers launched in the same RM would then have the same timestamp. Both approaches I think
would work.  Having the same stamp looks more clear. 
                
> NM should reject containers allocated by previous RM
> ----------------------------------------------------
>
>                 Key: YARN-562
>                 URL: https://issues.apache.org/jira/browse/YARN-562
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-562.1.patch, YARN-562.2.patch, YARN-562.3.patch
>
>
> Its possible that after RM shutdown, before AM goes down,AM still call startContainer
on NM with containers allocated by previous RM. When RM comes back, NM doesn't know whether
this container launch request comes from previous RM or the current RM. we should reject containers
allocated by previous RM 

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