[FLINK-38381] Enumerate Kafka partitions across Kafka clusters #1030
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When using the DynamicKafkaSink, topics can be spread across multiple clusters. This used to work fine, but a regression has been added which considers partitions across different clusters to be identical. This limits the scale out of the source operator. Here is an example: ``` "1.Source__Kafka_Source_(testTopic).kafkaCluster.my-cluster-1.KafkaSourceReader.topic.testTopic.partition.0.currentOffset", "1.Source__Kafka_Source_(testTopic).kafkaCluster.my-cluster-2.KafkaSourceReader.topic.testTopic.partition.0.currentOffset" ``` Those would result be treated as one partition, but there are two partitions from separate kafka clusters.
tomncooper
approved these changes
Sep 18, 2025
gyfora
approved these changes
Sep 19, 2025
csviri
approved these changes
Sep 19, 2025
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When using the DynamicKafkaSink, topics can be spread across multiple clusters. This used to work fine, but a regression has been added which considers partitions across different clusters to be identical. This limits the scale out of the source operator.
Here is an example:
Those would result be treated as one partition, but there are two partitions from separate Kafka clusters.