[GitHub] [iceberg] hejiay commented on issue #8107: Api:Fix add the same listener to the same listeners queue multiple times

["hejiay (via GitHub)" <gi...@apache.org>]

hejiay commented on issue #8107:
URL: https://github.com/apache/iceberg/issues/8107#issuecomment-1643536459

   Thank you, the `KafkaCreateSnapshotEventToJsonListener` is my implementation of `Listener`, it sends create snapshot event to kafka topic when a snapshot was created.I register it into listeners when catalog initialize.
    And I found that when I execute the unit test `[TestFlinkHiveCatalog.testCreateCatalogWithWarehouseLocation()]`, the `HiveCatalog` would be initialized four times and the same KafkaCreateSnapshotEventToJsonListener object would be registered into the same eventType queue four times. So a snapshot event would be sent to kafka four times.
   


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