ableegoldman commented on a change in pull request #9186: URL: https://github.com/apache/kafka/pull/9186#discussion_r485097186
########## File path: streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamKTableJoinProcessor.java ########## @@ -58,23 +58,22 @@ public void init(final ProcessorContext context) { @Override public void process(final K1 key, final V1 value) { - // we do join iff keys are equal, thus, if key is null we cannot join and just ignore the record - // If {@code keyMapper} returns {@code null} it implies there is no match, - // so ignore unless it is a left join Review comment: Sorry, I think my original comment here was a bit ambiguous. What I meant was that the _removal_ of the comment seemed correct to me, ie we should not make any special exceptions for the left join case and should remove the `leftJoin` part of the `if (leftJoin || value2 != null) ` check down on line 79 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org