cadonna commented on code in PR #13855:
URL: https://github.com/apache/kafka/pull/13855#discussion_r1235096344
##########
streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImpl.java:
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@@ -1256,10 +1261,25 @@ private <VO, VR> KStream<K, VR> doStreamTableJoin(final
KTable<K, VO> table,
final NamedInternal renamed = new NamedInternal(joinedInternal.name());
final String name = renamed.orElseGenerateWithPrefix(builder, leftJoin
? LEFTJOIN_NAME : JOIN_NAME);
+
+ Optional<TimeOrderedKeyValueBuffer<K, V, V>> buffer = Optional.empty();
+
+ if (joined.gracePeriod() != null) {
Review Comment:
> So if someone set the grace period to zero then we can evict everything
from the buffer even after the grace period is changed.
Are you saying that if I set the grace period > 0 and I run my application,
then I stop my application and set the grace period == 0, and restart my
application, my application will process records from my first run?
Why should removing the grace period (grace period == null) behave
differently?
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