dongnuo123 commented on code in PR #16057:
URL: https://github.com/apache/kafka/pull/16057#discussion_r1612296899
##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java:
##########
@@ -4424,14 +4441,113 @@ private ConsumerGroupMember
validateConsumerGroupMember(
* @param context The request context.
* @param request The actual LeaveGroup request.
*
+ * @return The LeaveGroup response and the records to append.
+ */
+ public CoordinatorResult<LeaveGroupResponseData, CoordinatorRecord>
classicGroupLeave(
+ RequestContext context,
+ LeaveGroupRequestData request
+ ) throws UnknownMemberIdException, GroupIdNotFoundException {
+ Group group = groups.get(request.groupId(), Long.MAX_VALUE);
+
+ if (group == null) {
+ throw new UnknownMemberIdException(String.format("Group %s not
found.", request.groupId()));
+ }
+
+ if (group.type() == CLASSIC) {
+ return classicGroupLeaveToClassicGroup((ClassicGroup) group,
context, request);
+ } else {
+ return classicGroupLeaveToConsumerGroup((ConsumerGroup) group,
context, request);
+ }
+ }
+
+ /**
+ * Handle a classic LeaveGroupRequest to a ConsumerGroup.
+ *
+ * @param group The ConsumerGroup.
+ * @param context The request context.
+ * @param request The actual LeaveGroup request.
+ *
+ * @return The LeaveGroup response and the records to append.
+ */
+ private CoordinatorResult<LeaveGroupResponseData, CoordinatorRecord>
classicGroupLeaveToConsumerGroup(
+ ConsumerGroup group,
+ RequestContext context,
+ LeaveGroupRequestData request
+ ) throws UnknownMemberIdException, GroupIdNotFoundException {
+ List<MemberResponse> memberResponses = new ArrayList<>();
+ List<CoordinatorRecord> records = new ArrayList<>();
+ boolean hasValidLeaveGroupMember = false;
+
+ for (MemberIdentity memberIdentity: request.members()) {
+ String memberId = memberIdentity.memberId();
+ String instanceId = memberIdentity.groupInstanceId();
+ String reason = memberIdentity.reason() != null ?
memberIdentity.reason() : "not provided";
+
+ ConsumerGroupMember member;
+ try {
+ if (instanceId == null) {
+ member = group.getOrMaybeCreateMember(memberId, false);
+ throwIfMemberDoesNotUseClassicProtocol(member);
+
+ log.info("[Group {}] Static Member {} has left group " +
+ "through explicit `LeaveGroup` request; client
reason: {}",
+ group.groupId(), memberId, reason);
+ } else {
+ member = group.staticMember(instanceId);
+ throwIfStaticMemberIsUnknown(member, memberId);
+ // The LeaveGroup API allows administrative removal of
members by GroupInstanceId
+ // in which case we expect the MemberId to be undefined.
+ if (!UNKNOWN_MEMBER_ID.equals(memberId)) {
+ throwIfInstanceIdIsFenced(member, group.groupId(),
memberId, instanceId);
+ }
+ throwIfMemberDoesNotUseClassicProtocol(member);
+
+ log.info("[Group {}] Static Member {} with instance id {}
has left group " +
+ "through explicit `LeaveGroup` request; client
reason: {}",
+ group.groupId(), memberId, instanceId, reason);
+ }
+
+
records.addAll(removeMemberAndMaybeUpdateSubscriptionMetadata(group, member));
+ cancelTimers(group.groupId(), member.memberId());
Review Comment:
This will not be reverted if the replay/persistence fails. Is this something
we want to address with the snapshottable timer?
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