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https://issues.apache.org/jira/browse/YARN-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13800772#comment-13800772
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Alejandro Abdelnur commented on YARN-1321:
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The extra javac warning is expected as the static setNMToken() method is now
deprecated.
> NMTokenCache is a a singleton, prevents multiple AMs running in a single JVM
> to work correctly
> ----------------------------------------------------------------------------------------------
>
> Key: YARN-1321
> URL: https://issues.apache.org/jira/browse/YARN-1321
> Project: Hadoop YARN
> Issue Type: Bug
> Components: client
> Affects Versions: 2.2.0
> Reporter: Alejandro Abdelnur
> Assignee: Alejandro Abdelnur
> Priority: Blocker
> Fix For: 2.2.1
>
> Attachments: YARN-1321.patch, YARN-1321.patch, YARN-1321.patch
>
>
> NMTokenCache is a singleton. Because of this, if running multiple AMs in a
> single JVM NMTokens for the same node from different AMs step on each other
> and starting containers fail due to mismatch tokens.
> The error observed in the client side is something like:
> {code}
> ERROR org.apache.hadoop.security.UserGroupInformation:
> PriviledgedActionException as:llama (auth:PROXY) via llama (auth:SIMPLE)
> cause:org.apache.hadoop.yarn.exceptions.YarnException: Unauthorized request
> to start container.
> NMToken for application attempt : appattempt_1382038445650_0002_000001 was
> used for starting container with container token issued for application
> attempt : appattempt_1382038445650_0001_000001
> {code}
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