zhihai xu commented on YARN-1569:

I want to work on this issue(YARN-1569), Can someone assign this issue to me?


> For handle(SchedulerEvent) in FifoScheduler and CapacityScheduler, 
> SchedulerEvent should get checked (instanceof) for appropriate type before 
> casting
> -----------------------------------------------------------------------------------------------------------------------------------------------------
>                 Key: YARN-1569
>                 URL: https://issues.apache.org/jira/browse/YARN-1569
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>            Reporter: Junping Du
>            Priority: Minor
>              Labels: newbie
> As following: http://wiki.apache.org/hadoop/CodeReviewChecklist, we should 
> always check appropriate type before casting. 
> handle(SchedulerEvent) in FifoScheduler and CapacityScheduler didn't check so 
> far (no bug there now) but should be improved as FairScheduler.

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