presto-kafka/src/main/java/io/prestosql/plugin/kafka/KafkaRecordSet.java/KafkaRecordSet/endOfData
class KafkaRecordSet:        private boolean endOfData()
        {
            if (!reported.getAndSet(true)) {
                log.debug("Found a total of %d messages with %d bytes (%d messages expected). Last Offset: %d (%d, %d)",
                        totalMessages, totalBytes, split.getEnd() - split.getStart(),
                        cursorOffset, split.getStart(), split.getEnd());
            }
            return false;
        }