[YARN-3941] Proportional Preemption policy should try to avoid sending duplicate PREEMPT_CONTAINER event to scheduler

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: capacityscheduler
• Hadoop Flags: Reviewed
• Assignee: Sunil G
• Reporter: Sunil G
• Created: 20/Jul/15 18:05
• Updated: 30/Aug/16 01:19
• Resolved: 23/Jul/15 17:09

Description

Currently ProportionalCPP tries to send multiple PREEMPT_CONTAINER events to scheduler during every cycle of preemption check till the container is either forcefully killed or preempted by AM.
This can be throttled from ProportionalPreemptionPolicy to avoid excess of events to scheduler.