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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-562) NM should reject containers allocated by previous RM
Date Tue, 16 Apr 2013 19:01:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633194#comment-13633194
] 

Karthik Kambatla commented on YARN-562:
---------------------------------------

Hey Jian, cluster_timestamp makes me think of vector clocks and such (distributed synch clock),
container_allocation_timestamp makes more sense. Any specific reason to change it?
                
> 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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