squah-confluent commented on code in PR #20055:
URL: https://github.com/apache/kafka/pull/20055#discussion_r2174220247
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/modern/consumer/CurrentAssignmentBuilder.java:
##########
@@ -215,6 +254,56 @@ private boolean ownsRevokedPartitions(
return false;
}
+ /**
+ * Updates the current assignment, removing any partitions that are not
part of the subscribed topics.
+ *
+ * @param memberAssignedPartitions The assigned partitions of the member
to use.
+ * @return A new ConsumerGroupMember.
+ */
+ private ConsumerGroupMember computeCurrentAssignment(
+ Map<Uuid, Set<Integer>> memberAssignedPartitions
+ ) {
+ Set<Uuid> subscribedTopicIds = subscribedTopicIds();
+ if (subscribedTopicIds == null) {
+ // The member's subscribed topic regex is unresolved, so we cannot
tell whether topics
+ // are part of its subscription.
+ return member;
+ }
Review Comment:
I guess that would be better for consistency with the client's subscription.
I've made the change and added tests for unresolved vs resolved regexes at the
`CurrentAssignmentBuilder` level. There's an existing `GroupMetadataManager`
test that runs through the regex update flow.
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