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https://issues.apache.org/jira/browse/YARN-6982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16124901#comment-16124901
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Manikandan R commented on YARN-6982:
------------------------------------

[~rohithsharma] Thanks for review and filing this.

As this is related to YARN-65 and almost nearing completion, I assigning this 
to myself. Please re-assign if someone is already working on it.

> Potential issue on setting AMContainerSpec#tokenConf to null before app is 
> completed
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-6982
>                 URL: https://issues.apache.org/jira/browse/YARN-6982
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Rohith Sharma K S
>
> While reviewing patch for YARN-65, I found that many places 
> RMAppImpl#submissionContext sets containerLaunchcontext#setTokensConf has 
> been set to null i.e 
> {code}
> // set the memory free
> app.submissionContext.getAMContainerSpec().setTokensConf(null);
> {code}
> This appears be a issue if application is updated may be because queue move 
> or lifetime or priority, then submission context will be restored again into 
> state store. Consider after app update, if RM is restarted then submission 
> context will have null tokenConf. This could be a potential issue. 



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