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https://issues.apache.org/jira/browse/FLINK-38681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arvid Heise resolved FLINK-38681.
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Resolution: Fixed
> Fix threading model of KafkaEnumerator
> --------------------------------------
>
> Key: FLINK-38681
> URL: https://issues.apache.org/jira/browse/FLINK-38681
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: kafka-5.0.0
> Reporter: Arvid Heise
> Assignee: Arvid Heise
> Priority: Major
> Labels: pull-request-available
> Fix For: kafka-5.0.0
>
>
> FLINK-38453 broke the threading model of KafkaEnumerator by accessing some of
> the data structures from the worker thread without synchronization. The
> migration path also triggers NPE.
> We should partially revert FLINK-38453 to restore the threading model (and
> fix an original issue) and do migration lazily instead.
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