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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3260) NPE if AM attempts to register before RM processes launch event
Date Wed, 25 Feb 2015 16:00:08 GMT

    [ https://issues.apache.org/jira/browse/YARN-3260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336665#comment-14336665

Naganarasimha G R commented on YARN-3260:

Hi [~jlowe], I would like to work on this issue but if you are already planning to fix this
please feel free to reassign.

> NPE if AM attempts 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: Naganarasimha G R
> 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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