in src/main/java/org/apache/flink/benchmark/SortingBoundedInputBenchmarks.java [202:210]
public void processElement(Integer element) {
this.seenRecords++;
if (!Objects.equals(element, currentKey)) {
if (!seenKeys.add(element)) {
Assert.fail("Received an out of order key: " + element);
}
currentKey = element;
}
}