Junping Du resolved YARN-3449.
    Resolution: Invalid
      Assignee:     (was: Junping Du)

> Recover appTokenKeepAliveMap upon nodemanager restart
> -----------------------------------------------------
>                 Key: YARN-3449
>                 URL: https://issues.apache.org/jira/browse/YARN-3449
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>    Affects Versions: 2.6.0, 2.7.0
>            Reporter: Junping Du
> appTokenKeepAliveMap in NodeStatusUpdaterImpl is used to keep application 
> alive after application is finished but NM still need app token to do log 
> aggregation (when enable security and log aggregation). 
> The applications are only inserted into this map when receiving 
> getApplicationsToCleanup() from RM heartbeat response. And RM only send this 
> info one time in RMNodeImpl.updateNodeHeartbeatResponseForCleanup(). NM 
> restart work preserving should put appTokenKeepAliveMap into NMStateStore and 
> get recovered after restart. Without doing this, RM could terminate 
> application earlier, so log aggregation could be failed if security is 
> enabled.

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