Arvid Heise created FLINK-19338:
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Summary: New source interface cannot unregister unregistered source
Key: FLINK-19338
URL: https://issues.apache.org/jira/browse/FLINK-19338
Project: Flink
Issue Type: Bug
Affects Versions: 1.11.2, 1.12.0
Reporter: Arvid Heise
Assignee: Arvid Heise
When a source subtask fails before the respective reader is registered in
{{SourceCoordinatorContext}}, unregistering fails as it explicitly verifies
that the reader has been registered before.
The solution is to drop the assumption that all readers are registered when
cleaning up subtasks.
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