Varun Saxena updated YARN-3986:
    Attachment: YARN-3986.02.patch

Fixed checkstyle issues

> getTransferredContainers in AbstractYarnScheduler should be present in 
> YarnScheduler interface instead
> ------------------------------------------------------------------------------------------------------
>                 Key: YARN-3986
>                 URL: https://issues.apache.org/jira/browse/YARN-3986
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.7.0
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
>         Attachments: YARN-3986.01.patch, YARN-3986.02.patch
> Currently getTransferredContainers is present in {{AbstractYarnScheduler}}.
> *But in ApplicationMasterService, while registering AM, we are calling this 
> method by typecasting it to AbstractYarnScheduler, which is incorrect.*
> This method should be moved to YarnScheduler.
> Because if a custom scheduler is to be added, it will implement 
> YarnScheduler, not AbstractYarnScheduler.
> As ApplicationMasterService is calling getTransferredContainers by 
> typecasting it to AbstractYarnScheduler, it is imposing an indirect 
> dependency on AbstractYarnScheduler for any pluggable custom scheduler.
> We can move the method to YarnScheduler and leave the definition in 
> AbstractYarnScheduler as it is.

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