Vinod Kumar Vavilapalli commented on YARN-2704:

Good catch! Sigh, it was there in my yet-not-posted design doc for YARN-941, 
but missed it somehow.

I think the only rational solution for this is decoupling tokens for 
localization and log-aggregation from user. I don't like adding new APIs 
through which users can submit new tokens - this is really a YARN 
responsibility and so it should automatically get tokens that are needed.

>  Localization and log-aggregation will fail if hdfs delegation token expired 
> after token-max-life-time
> ------------------------------------------------------------------------------------------------------
>                 Key: YARN-2704
>                 URL: https://issues.apache.org/jira/browse/YARN-2704
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Jian He
>            Assignee: Jian He
> In secure mode, YARN requires the hdfs-delegation token to do localization 
> and log aggregation on behalf of the user. But the hdfs delegation token will 
> eventually expire after max-token-life-time.  So,  localization and log 
> aggregation will fail after the token expires.

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