[YARN-1382] Remove unusableRMNodesConcurrentSet (never used) in NodeListManager to get rid of memory leak

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0, 2.7.1, 2.6.2
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: resourcemanager
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Rohith Sharma K S
• Reporter: Alejandro Abdelnur
• Created: 31/Oct/13 17:39
• Updated: 25/Oct/19 20:24
• Resolved: 30/Dec/15 15:48

Description

If a node is in the unusable nodes set (unusableRMNodesConcurrentSet) and never comes back, the node will be there forever.

While the leak is not big, it gets aggravated if the NM addresses are configured with ephemeral ports as when the nodes come back they come back as new.

Some related details in YARN-1343