[YARN-9642] Fix Memory Leak in AbstractYarnScheduler caused by timer

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 3.3.0, 3.2.1, 3.1.3
• Component/s: resourcemanager
• Labels: memory-leak
• Target Version/s: 3.2.1, 3.1.3
• Assignee: Bibin Chundatt
• Reporter: Bibin Chundatt
• Created: 22/Jun/19 04:06
• Updated: 26/Aug/19 17:58
• Resolved: 26/Aug/19 17:57

Description

The TimeTask could hold the reference of Scheduler in case of fast switch over too.
AbstractYarnScheduler should make sure scheduled Timer cancelled on serviceStop.

Causes memory leak too