[YARN-7401] Reduce lock contention in ClusterNodeTracker#getClusterCapacity()

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0
• Fix Version/s: 3.0.0, 3.1.0
• Component/s: resourcemanager
• Target Version/s: 3.1.0
• Hadoop Flags: Reviewed
• Assignee: Daniel Templeton
• Reporter: Daniel Templeton
• Created: 26/Oct/17 22:46
• Updated: 07/Nov/17 23:37
• Resolved: 07/Nov/17 23:02

Description

Profiling the code shows massive latency in ClusterNodeTracker.getClusterCapacity() on getting the lock.