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https://issues.apache.org/jira/browse/YARN-717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669738#comment-13669738
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Omkar Vinit Joshi commented on YARN-717:
----------------------------------------

why do we need to keep 
ClientTokenPBImpl/ContainerTokenPBImpl/DelegationTokenPBImpl? can't we just 
remove that too?
                
> Copy BuilderUtil methods into token-related records
> ---------------------------------------------------
>
>                 Key: YARN-717
>                 URL: https://issues.apache.org/jira/browse/YARN-717
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-717.1.patch, YARN-717.2.patch
>
>
> This is separated from YARN-711,as after changing yarn.api.token from 
> interface to abstract class, eg: ClientTokenPBImpl has to extend two classes: 
> both TokenPBImpl and ClientToken abstract class, which is not allowed in JAVA.
> We may remove the ClientToken/ContainerToken/DelegationToken interface and 
> just use the common Token interface 

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