guozhangwang commented on a change in pull request #10612:
URL: https://github.com/apache/kafka/pull/10612#discussion_r624078706
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File path:
streams/src/main/java/org/apache/kafka/streams/kstream/internals/graph/StreamStreamJoinNode.java
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@@ -95,7 +98,10 @@ public void writeToTopology(final InternalTopologyBuilder
topologyBuilder) {
topologyBuilder.addStateStore(thisWindowStoreBuilder,
thisWindowedStreamProcessorName, otherProcessorName);
topologyBuilder.addStateStore(otherWindowStoreBuilder,
otherWindowedStreamProcessorName, thisProcessorName);
- outerJoinWindowStoreBuilder.ifPresent(builder ->
topologyBuilder.addStateStore(builder, thisProcessorName, otherProcessorName));
+ final StreamsConfig streamsConfig = topologyBuilder.getStreamsConfig();
+ if (streamsConfig == null ||
StreamsConfig.InternalConfig.getBoolean(streamsConfig.originals(),
ENABLE_KSTREAMS_OUTER_JOIN_SPURIOUS_RESULTS_FIX, true)) {
Review comment:
Do we expect the user of this internal flag to always set it? If say the
caller had a bug to forget set it, should we default it to false instead?
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