[jira] [Commented] (KAFKA-8408) Create one request purgator for all the controller requests

["Jose Armando Garcia Sancio (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-8408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16846157#comment-16846157 ] 

Jose Armando Garcia Sancio commented on KAFKA-8408:
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What do you think [~cmccabe] [~hachikuji]?

> Create one request purgator for all the controller requests
> -----------------------------------------------------------
>
>                 Key: KAFKA-8408
>                 URL: https://issues.apache.org/jira/browse/KAFKA-8408
>             Project: Kafka
>          Issue Type: Improvement
>          Components: controller
>    Affects Versions: 2.4
>            Reporter: Jose Armando Garcia Sancio
>            Assignee: Jose Armando Garcia Sancio
>            Priority: Critical
>
> Some RPCs (i.e. leader election) for the controller are going through the replica manager. It looks like the reason for this is because currently the replica manager has all of the purgatory queues. Another other issue is that we have one purgatory per request type; this makes it harder (more work) to add requests that go directly to the controller by passing zk.
> In the case of the controller it should be enough to have one purgatory queue for all requests. This should make it easier to add more requests for the controller. And to migrate all of the requests that go through ZK to instead get routed to the controller's event queue.
> To resolve this issue we should:
> 1. create one purgatory can be used for all of the controller's RPC.
> 1. move this purgatory out of the replica manager
> 1. refactor the current leader election purgatory to instead use the generic purgatory



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