[jira] [Assigned] (KAFKA-18021) Disabled MirrorCheckpointConnector throws RetriableException on task config generation

["TengYao Chi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-18021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

TengYao Chi reassigned KAFKA-18021:
-----------------------------------

    Assignee: TengYao Chi

> Disabled MirrorCheckpointConnector throws RetriableException on task config generation
> --------------------------------------------------------------------------------------
>
>                 Key: KAFKA-18021
>                 URL: https://issues.apache.org/jira/browse/KAFKA-18021
>             Project: Kafka
>          Issue Type: Bug
>          Components: mirrormaker
>    Affects Versions: 3.9.0
>            Reporter: Greg Harris
>            Assignee: TengYao Chi
>            Priority: Major
>              Labels: newbie
>
> In KAFKA-17232, the MirrorCheckpointConnector#taskConfigs was changed to throw RetriableException when loadInitialConsumerGroups had not yet completed.
> When disabled, the MirrorCheckpointConnector#start method returns early, and never initiates the loadInitialConsumerGroups. When the MirrorCheckpointConnector#taskConfigs is called, it will continuously throw RetriableExceptions, as there is no maximum number of retries and no background process loading consumer groups asynchronously.
> For connectors which have never been enabled, this is a cosmetic bug, generating log spam but not harming the operation of the tasks.
> When changing a MirrorCheckpointConnector from enabled to disabled, this prevents emitting an empty set of task configs and disabling the already-running tasks, making it impossible to disable the MirrorCheckpointTasks.



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