Sylwester Lachiewicz created FLINK-40137:
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             Summary: Extract ReaderRecoveryCoordinator from 
DynamicKafkaSourceEnumerator
                 Key: FLINK-40137
                 URL: https://issues.apache.org/jira/browse/FLINK-40137
             Project: Flink
          Issue Type: Improvement
            Reporter: Sylwester Lachiewicz


▎ The enumerator accumulated three interacting pieces of recovery-gating state 
(initial registration pending, reported splits pending redistribution, deferred 
metadata-update readers) inline, making the gating semantics hard to follow and 
untestable without a full container-based test setup. Extract this state and 
its logic into a dedicated ReaderRecoveryCoordinator class with its own unit 
tests. No behavior change.



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