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https://issues.apache.org/jira/browse/FLINK-39723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rui Fan reassigned FLINK-39723:
-------------------------------
Assignee: Aleksandr Savonin
> KafkaTableITCase.testExactlyOnceSink fails due to transactional ID reuse
> across test runs
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-39723
> URL: https://issues.apache.org/jira/browse/FLINK-39723
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Reporter: Aleksandr Savonin
> Assignee: Aleksandr Savonin
> Priority: Major
>
> KafkaTableITCase.testExactlyOnceSink intermittently fails in CI with
> ProducerFencedException caused by transactional producer state leaking
> between test runs on the same Kafka broker instance.
> Observed in: CI run
> https://github.com/apache/flink-connector-kafka/actions/runs/26227821749
>
> Ideas/potential fixes to think about:
> - Use randomized/unique transactional ID prefixes per test run (similar to
> how topic names already use random UUIDs)
> - Or explicitly abort any open transactions with the same ID before the
> test starts
> - Or ensure the Kafka container is fully restarted between parameterized
> variants that share transactional ID space
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