ableegoldman commented on a change in pull request #9582:
URL: https://github.com/apache/kafka/pull/9582#discussion_r523175703
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File path:
streams/src/main/java/org/apache/kafka/streams/processor/internals/InternalTopologyBuilder.java
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@@ -410,18 +410,6 @@ public final void addSource(final Topology.AutoOffsetReset
offsetReset,
}
}
- for (final Pattern otherPattern : earliestResetPatterns) {
- if (topicPattern.pattern().contains(otherPattern.pattern()) ||
otherPattern.pattern().contains(topicPattern.pattern())) {
- throw new TopologyException("Pattern " + topicPattern + " will
overlap with another pattern " + otherPattern + " already been registered by
another source");
- }
- }
-
- for (final Pattern otherPattern : latestResetPatterns) {
- if (topicPattern.pattern().contains(otherPattern.pattern()) ||
otherPattern.pattern().contains(topicPattern.pattern())) {
- throw new TopologyException("Pattern " + topicPattern + " will
overlap with another pattern " + otherPattern + " already been registered by
another source");
- }
- }
-
Review comment:
I think in this case we were matching whether the pattern's string was a
literal substring of another pattern's string, not whether the regexes
themselves are substrings. So `topi*` would not be a substring of `topic*`
because `topi*` is not contained literally within the string `topic*`. It's not
doing a smart regex-matching, just a dumb literal string comparison
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