[YARN-10625] FairScheduler: add global flag to disable AM-preemption

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3.0
• Fix Version/s: 3.4.0
• Component/s: fairscheduler
• Hadoop Flags: Reviewed
• Assignee: Peter Bacsko
• Reporter: Peter Bacsko
• Created: 12/Feb/21 11:13
• Updated: 17/Feb/21 12:04
• Resolved: 16/Feb/21 17:08

Description

YARN-9537 added a feature to disable AM preemption on a per queue basis.

This is a nice enhancement, but it's very inconvenient if the cluster has a lot of queues or queues dynamically created/deleted regularly (static queue configuration changes).

It's a legitimate use-case to have AM preemption turned off completely. To make it easier, add property which acts as a global flag for this feature.

Issue Links

• is related to: YARN-9537 Add configuration to disable AM preemption
• relates to: YARN-10631 Document AM preemption related changes (YARN-9537 and YARN-10625)