[YARN-2395] FairScheduler: Preemption timeout should be configurable per queue

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.6.0
• Component/s: fairscheduler
• Hadoop Flags: Reviewed
• Assignee: Wei Yan
• Reporter: Ashwin Shankar
• Created: 07/Aug/14 18:02
• Updated: 01/Dec/14 03:08
• Resolved: 30/Aug/14 08:31

Description

Currently in fair scheduler, the preemption logic considers fair share starvation only at leaf queue level. This jira is created to implement it at the parent queue as well.
It involves :
1. Making "check for fair share starvation" and "amount of resource to preempt" recursive such that they traverse the queue hierarchy from root to leaf.
2. Currently fairSharePreemptionTimeout is a global config. We could make it configurable on a per queue basis,so that we can specify different timeouts for parent queues.