Dongnuo Lyu e9c5069be7 KAFKA-18687: Setting the subscriptionMetadata during conversion to consumer group (#19790) ... When a consumer protocol static member replaces an existing member in a classic group, it's not necessary to recompute the assignment. However, it happens anyway. In [ConsumerGroup.fromClassicGroup](0ff4dafb7d/group-coordinator/src/main/java/org/apache/kafka/coordinator/group/modern/consumer/ConsumerGroup.java (L1140)), we don't set the group's subscriptionMetadata. Later in the consumer group heartbeat, we [call updateSubscriptionMetadata](0ff4dafb7d/group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java (L1748)), which [notices that the group's subscriptionMetadata needs an update](0ff4dafb7d/group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java (L2757)) and bumps the epoch. Since the epoch is bumped, we [recompute the assignment](0ff4dafb7d/group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java (L1766)). As a fix, this patch sets the subscriptionMetadata in ConsumerGroup.fromClassicGroup. Reviewers: Sean Quah <squah@confluent.io>, David Jacot <djacot@confluent.io>		2025-05-27 11:31:13 +02:00
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group-coordinator-api/src/main/java/org/apache/kafka/coordinator/group/api/assignor	MINOR: Mark KIP-848's public apis as stable (#18235)	2024-12-17 20:10:38 +01:00
src	KAFKA-18687: Setting the subscriptionMetadata during conversion to consumer group (#19790)	2025-05-27 11:31:13 +02:00
.gitignore	KAFKA-14363; Add new `group-coordinator` module (KIP-848) (#12827)	2022-11-09 08:49:57 +01:00