florin-akermann commented on code in PR #15189:
URL: https://github.com/apache/kafka/pull/15189#discussion_r1518667989
##########
streams/src/test/java/org/apache/kafka/streams/integration/RelaxedNullKeyRequirementJoinTest.java:
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@@ -71,11 +71,21 @@ void afterEach() {
@Test
void testRelaxedLeftStreamStreamJoin() {
leftStream
- .leftJoin(rightStream, JOINER, WINDOW)
+ .leftJoin(rightStream, JOINER, WINDOW_60MS_GRACE_10MS)
.to(OUT);
initTopology();
- left.pipeInput(null, "leftValue", 1);
- assertEquals(Collections.singletonList(new KeyValue<>(null,
"leftValue|null")), out.readKeyValuesToList());
+ left.pipeInput(null, "leftValue1", 1);
+ left.pipeInput(null, "leftValue2", 90);
+ left.pipeInput(null, "lateArrival-Dropped", 19);
+ left.pipeInput(null, "lateArrivalWithinGrace", 20);
+ assertEquals(
+ Arrays.asList(
+ new KeyValue<>(null, "leftValue1|null"),
+ new KeyValue<>(null, "leftValue2|null"),
+ new KeyValue<>(null, "lateArrivalWithinGrace|null")
Review Comment:
Yes, good point. As is, the KStreamKStreamJoin forwards null-key records
directly and not only after the window closes.
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