[YARN-6986] Fair scheduler should add a SchedulerMetrics class

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-alpha4
• Component/s: fairscheduler
• Assignee: Unassigned
• Reporter: Daniel Templeton
• Created: 10/Aug/17 16:29
• Updated: 10/Aug/17 16:29

Description

Especially now that ATSv2 is almost here, it would be very helpful if the fair scheduler offered scheduler metrics, like # pending requests, # running containers, # preemptions, size of the event queue, etc.

Currently I see cluster metrics, queue metrics, and scheduler operation duration metrics, but no top-level scheduler metrics.