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https://issues.apache.org/jira/browse/YARN-3260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bibin A Chundatt updated YARN-3260:
-----------------------------------
Priority: Critical (was: Major)
> 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: 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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