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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2052) ContainerId creation after work preserving restart is broken
Date Tue, 17 Jun 2014 21:59:08 GMT

    [ https://issues.apache.org/jira/browse/YARN-2052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14034448#comment-14034448
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Vinod Kumar Vavilapalli commented on YARN-2052:
-----------------------------------------------

bq. BTW, I think we should update CheckpointAMPreemptionPolicy after this JIRA. 
Ideally this should be container-allocation timestamp and we should depend on that instead
of comparing container-IDs. IAC, let's fix it separately..

> ContainerId creation after work preserving restart is broken
> ------------------------------------------------------------
>
>                 Key: YARN-2052
>                 URL: https://issues.apache.org/jira/browse/YARN-2052
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-2052.1.patch, YARN-2052.2.patch, YARN-2052.3.patch
>
>
> Container ids are made unique by using the app identifier and appending a monotonically
increasing sequence number to it. Since container creation is a high churn activity the RM
does not store the sequence number per app. So after restart it does not know what the new
sequence number should be for new allocations.



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