Jeff Kim created KAFKA-10193:
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Summary: Add preemption for ControllerEvent that have callbacks
Key: KAFKA-10193
URL: https://issues.apache.org/jira/browse/KAFKA-10193
Project: Kafka
Issue Type: Bug
Components: controller, metrics
Reporter: Jeff Kim
Assignee: Jeff Kim
There are classes that extends `ControllerEvent` and have callbacks but do not
provide preemption:
1.
[ApiPartitionReassignment|https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/controller/KafkaController.scala#L2073-L2074]
2.
[ListPartitionReassignments|https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/controller/KafkaController.scala#L2098-L2099]
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|https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/controller/KafkaController.scala#L1862-L1870].
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