[YARN-1569] For handle(SchedulerEvent) in FifoScheduler and CapacityScheduler, SchedulerEvent should get checked (instanceof) for appropriate type before casting

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Component/s: scheduler
• Labels: newbie
• Assignee: Zhihai Xu
• Reporter: Junping Du
• Created: 08/Jan/14 03:35
• Updated: 04/Jun/14 21:51
• Resolved: 04/Jun/14 21:51

Description

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.