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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3260) AM attempt fail to register before RM processes launch event
Date Thu, 13 Jul 2017 23:12:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-3260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086574#comment-16086574

Jason Lowe commented on YARN-3260:

Thanks for the patch!  +1 lgtm.  I'll commit this tomorrow if there are no objections.

> AM attempt fail to register before RM processes launch event
> ------------------------------------------------------------
>                 Key: YARN-3260
>                 URL: https://issues.apache.org/jira/browse/YARN-3260
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Bibin A Chundatt
>            Priority: Critical
>         Attachments: YARN-3260.001.patch
> The RM on one of our clusters was running behind on processing AsyncDispatcher events,
and this caused AMs to fail to register due to an NPE.  The AM was launched and attempting
to register before the RMAppAttemptImpl had processed the LAUNCHED event, and the client to
AM token had not been generated yet.  The NPE occurred because the ApplicationMasterService
tried to encode the missing token.

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