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Posted to jira@kafka.apache.org by "Jeff Kim (Jira)" <ji...@apache.org> on 2020/06/22 22:20:00 UTC

[jira] [Updated] (KAFKA-10193) Add preemption for controller events that have callbacks

     [ https://issues.apache.org/jira/browse/KAFKA-10193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeff Kim updated KAFKA-10193:
-----------------------------
    Summary: Add preemption for controller events that have callbacks  (was: Add preemption for ControllerEvent that have callbacks)

> Add preemption for controller events 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
>            Priority: Minor
>
> 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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