Github user StephanEwen commented on the issue: https://github.com/apache/flink/pull/2546 Actually, let me take a step back and understand a few things deeper, first. Who actually generates the watermarks (in ingestion time)? The operator that creates the file splits, or the operator that reads the splits? If the configuration is set to IngestionTime, will the operator that creates the file splits emit a final LongMax watermark? Is that one passing through by the split-reading operator? Is there a test that test that specific scenario? (I believe it was the initially reported bug).
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