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https://issues.apache.org/jira/browse/MAPREDUCE-2780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081301#comment-13081301
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Jitendra Nath Pandey commented on MAPREDUCE-2780:
-------------------------------------------------

Daryn and I discussed it at length, the conclusions were:
It is better to treat service as opaque, as in current Token API.
A convenience method to set service using InetSocketAddress is useful. 
Therefore we add a method in SecurityUtil that takes a token and an 
InetSocketAddress, constructs a service and sets it in the token. And the Token 
API remains unchanged.

> Standardize the value of token service
> --------------------------------------
>
>                 Key: MAPREDUCE-2780
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2780
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 0.20.205.0
>
>         Attachments: MAPREDUCE-2780-2.patch, MAPREDUCE-2780.patch
>
>
> The token's service field must (currently) be set to "ip:port".  All the 
> producers of a token are independently building the service string.  This 
> should be done via a common method to reduce the chance of error, and to 
> facilitate the field value being easily changed in the (near) future.

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