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https://issues.apache.org/jira/browse/MAPREDUCE-5379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13704702#comment-13704702
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Daryn Sharp commented on MAPREDUCE-5379:
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[~sandyr] Would you please elaborate on the problem and use case you are trying 
to address?  I don't understand exactly what you mean:
* Is "token ID" the token identifier, the token service, etc?
* What is an external service in this scenario?
* What does it mean to associate a token with fs operations?
                
> Include FS delegation token ID in job conf
> ------------------------------------------
>
>                 Key: MAPREDUCE-5379
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5379
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: job submission, security
>    Affects Versions: 2.1.0-beta
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>
> Making a job's FS delegation token ID accessible will allow external services 
> to associate it with the file system operations it performs.

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