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This reader is responsible for discovering and assigning splits from 1+ clusterscluster. At startup, the enumerator will invoke the KafkaStreamSubscriber and reconcile changes from state. Source events will be sent to the source reader to reconcile the metadata. This enumerator has the ability to poll the KafkaMetadataService, periodically for stream discovery. In addition, restarting enumerators involve clearing outdated metrics since clusters may be removed and so should their metrics.

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