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https://issues.apache.org/jira/browse/MAPREDUCE-4921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated MAPREDUCE-4921:
-----------------------------------

    Attachment: MAPREDUCE-4921.patch

Patch universally applies to trunk -> 23.  I moved {{TestYARNRunner}} so I 
could change a private {{YARNRunner}} method to package scope instead of public.
                
> JobClient should acquire HS token with RM principal
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-4921
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4921
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 3.0.0, 2.0.3-alpha, 0.23.6
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: MAPREDUCE-4921.branch-23.patch, MAPREDUCE-4921.patch
>
>
> The job client may acquire a history server token during job submission.  The 
> renewer is specified in a config value that the user must supply (for new 
> api, a bit different for old api).  If this value is not the RM's principal, 
> then the RM cannot renew the token and long running jobs will fail.  Since 
> the token is implicitly acquired for the job, the HS token's renewer should 
> always be the RM's principal.

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