Fixed: apache/flink#42905 (release-1.9 - a9bbcc6)

[Flink CI]

apache / flink release-1.9 Build #42905 fixed 4 hrs, 15 mins, 42 secs Maximilian Michels a9bbcc6 CHANGESET → [FLINK-16573] Ensure Kinesis RecordFetcher threads shutdown on cancel The threads may not shut down correctly because they do not check for the running flag in the inner loops. The threads also do not get interrupted because they are not connected to the main task thread. These threads keep lingering around after the job has shut down: ``` Thread 23168: (state = BLOCKED) - java.lang.Object.wait(long) @bci=0 (Compiled frame; information may be imprecise) - org.apache.flink.streaming.connectors.kinesis.util.RecordEmitter.emitRecords() @bci=140, line=209 (Compiled frame) - org.apache.flink.streaming.connectors.kinesis.util.RecordEmitter.run() @bci=18, line=177 (Interpreted frame) - java.lang.Thread.run() @bci=11, line=748 (Compiled frame) ```