[IMPALA-11827] do not cache admission control service's IP address in coordinator

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.3.0
• Epic Color: ghx-label-8
• Assignee: Abhishek Rawat
• Reporter: Abhishek Rawat
• Created: 05/Jan/23 17:45
• Updated: 18/Jan/23 06:39
• Resolved: 18/Jan/23 06:39

Description

The Impalad's ExecEnv caches resolved IP address for admission control service:

https://github.com/apache/impala/blob/master/be/src/runtime/exec-env.h#L301

The Impala server runs a heart beat thread for admission control service and it relies on the cached resolved address in ExecEnv:

https://github.com/apache/impala/blob/master/be/src/service/impala-server.cc#L584

This breaks when IP address for admission control services changes and so we shouldn't cache dynamic addresses.