Chris Egerton created KAFKA-10812:
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Summary: Unclean worker shutdown in MirrorConnectorsIntegrationTest
Key: KAFKA-10812
URL: https://issues.apache.org/jira/browse/KAFKA-10812
Project: Kafka
Issue Type: Bug
Components: KafkaConnect, mirrormaker
Affects Versions: 2.7.0
Reporter: Chris Egerton
Although the flakiness for the {{MirrorConnectorsIntegrationTest}} has
(hopefully) been addressed by https://github.com/apache/kafka/pull/9698, the
root cause (unclean worker shutdown during those tests) has still not been
addressed. This suggests that users of MirrorMaker 2 will see {{ERROR}} -level
stack traces when shutting down workers running MM2
(https://github.com/apache/kafka/blob/a57486e75084d70f1fbf22df9d3ffc3462302add/connect/runtime/src/main/java/org/apache/kafka/connect/runtime/distributed/DistributedHerder.java#L301-L304),
which looks fairly alarming, and may even indicate some problems with the
functioning of MM2 itself.
It'd be nice to diagnose the root cause of these unclean worker shutdowns when
running MM2 during these tests and address them via improvements to the test
cases, improvements to MM2 itself, or both.
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