dajac commented on code in PR #17976:
URL: https://github.com/apache/kafka/pull/17976#discussion_r1869957179
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java:
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@@ -3038,6 +3042,59 @@ private void replaceMember(
));
}
+ /**
+ * Maybe delete the resolved regular expression associated to the provided
member if
+ * it was the last subscribed member to it.
+ *
+ * @param records The record accumulator.
+ * @param group The group.
+ * @param member The member removed from the group.
+ */
+ private void maybeDeleteResolvedRegularExpression(
+ List<CoordinatorRecord> records,
+ ConsumerGroup group,
+ ConsumerGroupMember member
+ ) {
+ if (isNotEmpty(member.subscribedTopicRegex()) &&
group.numSubscribedMembers(member.subscribedTopicRegex()) == 1) {
+ records.add(newConsumerGroupRegularExpressionTombstone(
+ group.groupId(),
+ member.subscribedTopicRegex()
+ ));
+ }
+ }
+
+ /**
+ * Maybe delete the resolved regular expressions associated with the
provided members
+ * if they were the last ones subscribed to them.
+ *
+ * @param records The record accumulator.
+ * @param group The group.
+ * @param members The member removed from the group.
+ * @return The set of deleted regular expressions.
+ */
+ private Set<String> maybeDeleteResolvedRegularExpressions(
Review Comment:
ah, got it. let me extend that test.
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