[YARN-10399] Refactor NodeQueueLoadMonitor class to make it extendable

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.2.1
• Fix Version/s: 3.4.0
• Component/s: resourcemanager
• Hadoop Flags: Reviewed
• Assignee: Zhengbo Li
• Reporter: Zhengbo Li
• Created: 14/Aug/20 17:24
• Updated: 19/Aug/20 17:15
• Resolved: 19/Aug/20 17:15

Description

Currently the NodeQueueLoadMonitor is written is a way that doesn't allow overriding the node selection logic, this refactor will extract the core logic piece to allow extended class to override the default logics.

Issue Links

• links to: PR 2228