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https://issues.apache.org/jira/browse/KAFKA-10792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17263771#comment-17263771
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Randall Hauch commented on KAFKA-10792:
---------------------------------------
Backported/merged to the `2.7` branch for inclusion in the next patch release
(2.7.1).
> Source tasks can block herder thread by hanging during stop
> -----------------------------------------------------------
>
> Key: KAFKA-10792
> URL: https://issues.apache.org/jira/browse/KAFKA-10792
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 2.4.0, 2.5.0, 2.4.1, 2.6.0, 2.4.2, 2.5.1, 2.7.0
> Reporter: Chris Egerton
> Assignee: Chris Egerton
> Priority: Major
> Fix For: 2.8.0, 2.7.1
>
>
> If a source task blocks during its {{stop}} method, the herder thread will
> also block, which can cause issues with detecting rebalances, reconfiguring
> connectors, and other vital functions of a Connect worker.
> This occurs because the call to {{SourceTask::stop}} occurs on the herder's
> thread, instead of on the source task's own dedicated thread. This can be
> fixed by moving the call to {{SourceTask::stop}} onto the source task's
> dedicated thread and aligning with the current approach for {{Connector}}
> instances and {{SinkTask}} instances.
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