[KAFKA-10193] Add preemption for controller events that have callbacks

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Component/s: controller, metrics
• Labels: controller
• Assignee: Jeff Kim
• Reporter: Jeff Kim
• Created: 22/Jun/20 22:18
• Updated: 07/Aug/20 17:19
• Resolved: 07/Aug/20 17:19

Description

There are classes that extends `ControllerEvent` and have callbacks but do not provide preemption:
1. ApiPartitionReassignment

2. ListPartitionReassignments

Currently, the KafkaApi requests timeout for these events when the state of the controller changes. Instead we should preempt these events so that the requests are responded with a `NOT_CONTROLLER` error as we do for `ControlledShutdown` and `ReplicaLeaderElection` events. We can provide preemption here.  

Issue Links

• links to: GitHub Pull Request #9050