[HDFS-15238] RBF：NamenodeHeartbeatService caused memory to grow rapidly

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Hadoop Flags: Reviewed
• Assignee: ZanderXu
• Reporter: ZanderXu
• Created: 24/Mar/20 11:14
• Updated: 27/Mar/20 08:47
• Resolved: 27/Mar/20 08:32

Description

NamenodeHeartbeatService will get NameNode's HA status every 5s, and created HAServiceProtocol every time.

When creating HAServiceProtocol, it also will new Configuration.
Over time, there will be more and more entries for REGISTER in Configuration until fullGc happen.
The entry will piles up again, after reaching a certain threshold, the fullGc is triggered again.