Rohith Sharma K S created YARN-6982:

             Summary: Potential issue on setting AMContainerSpec#tokenConf to 
null before app is completed
                 Key: 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 
// set the memory free

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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