cadonna commented on code in PR #19181: URL: https://github.com/apache/kafka/pull/19181#discussion_r1991827905
########## clients/src/main/java/org/apache/kafka/clients/consumer/internals/StreamsGroupHeartbeatRequestManager.java: ########## @@ -82,29 +97,41 @@ public StreamsGroupHeartbeatRequestData buildRequestData() { data.setMemberId(membershipManager.memberId()); data.setMemberEpoch(membershipManager.memberEpoch()); membershipManager.groupInstanceId().ifPresent(data::setInstanceId); - StreamsGroupHeartbeatRequestData.Topology topology = new StreamsGroupHeartbeatRequestData.Topology(); - topology.setSubtopologies(getTopologyFromStreams(streamsRebalanceData.subtopologies())); - topology.setEpoch(streamsRebalanceData.topologyEpoch()); - data.setRebalanceTimeoutMs(rebalanceTimeoutMs); - data.setTopology(topology); - data.setProcessId(streamsRebalanceData.processId().toString()); - streamsRebalanceData.endpoint().ifPresent(userEndpoint -> { - data.setUserEndpoint(new StreamsGroupHeartbeatRequestData.Endpoint() - .setHost(userEndpoint.host()) - .setPort(userEndpoint.port()) - ); - }); - data.setClientTags(streamsRebalanceData.clientTags().entrySet().stream() - .map(entry -> new StreamsGroupHeartbeatRequestData.KeyValue() - .setKey(entry.getKey()) - .setValue(entry.getValue()) - ) - .collect(Collectors.toList())); + + boolean joining = membershipManager.state() == MemberState.JOINING; + + if (joining) { + StreamsGroupHeartbeatRequestData.Topology topology = new StreamsGroupHeartbeatRequestData.Topology(); + topology.setSubtopologies(getTopologyFromStreams(streamsRebalanceData.subtopologies())); + topology.setEpoch(streamsRebalanceData.topologyEpoch()); + data.setTopology(topology); + data.setRebalanceTimeoutMs(rebalanceTimeoutMs); + data.setProcessId(streamsRebalanceData.processId().toString()); + streamsRebalanceData.endpoint().ifPresent(userEndpoint -> { + data.setUserEndpoint(new StreamsGroupHeartbeatRequestData.Endpoint() + .setHost(userEndpoint.host()) + .setPort(userEndpoint.port()) + ); + }); + data.setClientTags(streamsRebalanceData.clientTags().entrySet().stream() + .map(entry -> new StreamsGroupHeartbeatRequestData.KeyValue() + .setKey(entry.getKey()) + .setValue(entry.getValue()) + ) + .collect(Collectors.toList())); + data.setActiveTasks(convertTaskIdCollection(Set.of())); Review Comment: The protocol specifies that the assignment needs to consists of empty sets when joining. The heartbeat handler broker side distinguishes between an empty assignment and an assignment that was not sent in the heartbeat. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org