[YARN-3275] CapacityScheduler: Preemption happening on non-preemptable queues

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.7.0
• Labels: capacity-scheduler
• Hadoop Flags: Reviewed
• Assignee: Eric Payne
• Reporter: Eric Payne
• Created: 27/Feb/15 16:44
• Updated: 24/Apr/15 23:17
• Resolved: 06/Mar/15 22:46

Description

YARN-2056 introduced the ability to turn preemption on and off at the queue level. In cases where a queue goes over its absolute max capacity (YARN-3243, for example), containers can be preempted from that queue, even though the queue is marked as non-preemptable.

We are using this feature in large, busy clusters and seeing this behavior.