[YARN-7690] Expose reserved Memory/Vcores of Node Manager at WebUI

• Type: Improvement
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Component/s: webapp
• Assignee: Juanjuan Tian
• Reporter: Juanjuan Tian
• Created: 29/Dec/17 04:23
• Updated: 28/Jun/18 17:04

Description

Now only total reserved memory/Vcores are exposed at RM Web UI, reserved memory/Vcores of a single nodemanager is hard to find out. It confuses users that they observe that there are available memory/Vcores at nodes page, but their jobs are stuck and waiting for resource to be allocated. It is helpful for debug to expose reserved memory/Vcores of every single nodemanager, and memory/Vcores that can be allocated (unallocated minus reserved).