[YARN-4024] YARN RM should avoid unnecessary resolving IP when NMs doing heartbeat

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: resourcemanager
• Hadoop Flags: Reviewed
• Assignee: Hong Zhiguo
• Reporter: Wangda Tan
• Created: 06/Aug/15 18:11
• Updated: 08/Jun/17 02:07
• Resolved: 04/Sep/15 22:17

Description

Currently, YARN RM NodesListManager will resolve IP address every time when node doing heartbeat. When DNS server becomes slow, NM heartbeat will be blocked and cannot make progress.