Github user NicoK commented on a diff in the pull request: https://github.com/apache/flink/pull/4761#discussion_r154067761 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/api/writer/ResultPartitionWriter.java --- @@ -34,12 +31,10 @@ * The {@link ResultPartitionWriter} is the runtime API for producing results. It * supports two kinds of data to be sent: buffers and events. */ -public class ResultPartitionWriter implements EventListener<TaskEvent> { --- End diff -- a quick search reveals `NetworkEnvironment.java` calling `taskEventDispatcher.registerWriterForIncomingTaskEvents(writer.getPartitionId(), writer);` and therefore `TaskEventDispatcher` itself but there, the `EventListener` interface was actually only used in `TaskEventDispatcher#publish()` which is somewhat strange - agreed
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