[YARN-8657] User limit calculation should be read-lock-protected within LeafQueue

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Component/s: capacity scheduler
• Target Version/s: 3.2.5
• Assignee: Wangda Tan
• Reporter: Sumana Sathish
• Created: 14/Aug/18 00:01
• Updated: 12/Jul/22 16:06

Description

When async scheduling is enabled, user limit calculation could be wrong: 

It is possible that scheduler calculated a user_limit, but inside canAssignToUser it becomes staled.

We need to protect user limit calculation.