The GitHub Actions job "Flink Connector Kafka CI" on 
flink-connector-kafka.git/main has failed.
Run started by GitHub user bowenli86 (triggered by bowenli86).

Head commit for run:
904e88213ac4988087499c5621fe5c4c2a6ca4f9 / bowenli86 <[email protected]>
[FLINK-39979] DynamicKafkaSource should mark reader idle when metadata removal 
leaves a subtask with no active subreaders (#276)

DynamicKafkaSource can remain active after a metadata update removes the last 
active Kafka cluster/split from a reader subtask. Since no sub-reader remains 
to report idleness, downstream watermark progress can stall.

When the reader is already waiting on isAvailable(), resetting availability to 
zero sub-readers also leaves the cached availability future incomplete, so 
pollNext() is not invoked to release pending split outputs or mark the output 
idle.

Report URL: 
https://github.com/apache/flink-connector-kafka/actions/runs/28250172985

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