passing broker into the assignments

weed/mq/client/sub_client/connect_to_sub_coordinator.go

@@ -78,7 +78,7 @@ func (sub *TopicSubscriber) onEachAssignment(assignment *mq_pb.SubscriberToSubCo
 		go func(partition *mq_pb.Partition, broker string) {
 			defer wg.Done()
 			defer func() { <-semaphore }()
-			glog.V(0).Infof("subscriber %s/%s/%s assigned partition %+v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition)
+			glog.V(0).Infof("subscriber %s/%s/%s assigned partition %+v at %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker)
 			sub.onEachPartition(partition, broker)
 		}(assigned.Partition, assigned.Broker)
 	}
@@ -87,5 +87,4 @@ func (sub *TopicSubscriber) onEachAssignment(assignment *mq_pb.SubscriberToSubCo
 }
 
 func (sub *TopicSubscriber) onEachPartition(partition *mq_pb.Partition, broker string) {
-	glog.V(0).Infof("subscriber %s/%s/%s processing partition %+v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition)
 }

weed/mq/sub_coordinator/consumer_group.go

@@ -40,19 +40,19 @@ func NewConsumerGroupInstance(instanceId string) *ConsumerGroupInstance {
 	}
 }
 func (cg *ConsumerGroup) OnAddConsumerGroupInstance(consumerGroupInstance string, topic *mq_pb.Topic) {
-	cg.onConsumerGroupInstanceChange()
+	cg.onConsumerGroupInstanceChange("add consumer instance "+ consumerGroupInstance)
 }
 func (cg *ConsumerGroup) OnRemoveConsumerGroupInstance(consumerGroupInstance string, topic *mq_pb.Topic) {
-	cg.onConsumerGroupInstanceChange()
+	cg.onConsumerGroupInstanceChange("remove consumer instance "+ consumerGroupInstance)
 }
 
-func (cg *ConsumerGroup) onConsumerGroupInstanceChange(){
+func (cg *ConsumerGroup) onConsumerGroupInstanceChange(reason string){
 	if cg.reBalanceTimer != nil {
 		cg.reBalanceTimer.Stop()
 		cg.reBalanceTimer = nil
 	}
 	cg.reBalanceTimer = time.AfterFunc(5*time.Second, func() {
-		cg.RebalanceConsumberGroupInstances()
+		cg.RebalanceConsumberGroupInstances(reason)
 		cg.reBalanceTimer = nil
 	})
 }
@@ -61,11 +61,11 @@ func (cg *ConsumerGroup) OnPartitionListChange() {
 		cg.reBalanceTimer.Stop()
 		cg.reBalanceTimer = nil
 	}
-	cg.RebalanceConsumberGroupInstances()
+	cg.RebalanceConsumberGroupInstances("partition list change")
 }
 
-func (cg *ConsumerGroup) RebalanceConsumberGroupInstances() {
-	println("rebalance...")
+func (cg *ConsumerGroup) RebalanceConsumberGroupInstances(reason string) {
+	println("rebalance due to", reason, "...")
 
 	now := time.Now().UnixNano()
 
@@ -75,10 +75,6 @@ func (cg *ConsumerGroup) RebalanceConsumberGroupInstances() {
 		glog.V(0).Infof("topic %s not found in balancer", cg.topic.String())
 		return
 	}
-	partitions := make([]*topic.Partition, 0)
-	for _, partitionSlot := range partitionSlotToBrokerList.PartitionSlots {
-		partitions = append(partitions, topic.NewPartition(partitionSlot.RangeStart, partitionSlot.RangeStop, partitionSlotToBrokerList.RingSize, now))
-	}
 
 	// collect current consumer group instance ids
 	consumerInstanceIds := make([]string, 0)
@@ -86,7 +82,7 @@ func (cg *ConsumerGroup) RebalanceConsumberGroupInstances() {
 		consumerInstanceIds = append(consumerInstanceIds, consumerGroupInstance.InstanceId)
 	}
 
-	cg.mapping.BalanceToConsumerInstanceIds(partitions, consumerInstanceIds)
+	cg.mapping.BalanceToConsumerInstanceIds(partitionSlotToBrokerList, consumerInstanceIds)
 
 	// convert cg.mapping currentMapping to map of consumer group instance id to partition slots
 	consumerInstanceToPartitionSlots := make(map[string][]*PartitionSlotToConsumerInstance)
@@ -110,6 +106,7 @@ func (cg *ConsumerGroup) RebalanceConsumberGroupInstances() {
 					RingSize: partitionSlotToBrokerList.RingSize,
 					UnixTimeNs: now,
 				},
+				Broker: partitionSlot.Broker,
 			}
 		}
 		response := &mq_pb.SubscriberToSubCoordinatorResponse{

weed/mq/sub_coordinator/partition_consumer_mapping.go

@@ -2,7 +2,7 @@ package sub_coordinator
 
 import (
 	"fmt"
-	"github.com/seaweedfs/seaweedfs/weed/mq/topic"
+	"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
 	"time"
 )
 
@@ -23,19 +23,19 @@ func NewPartitionConsumerMapping(ringSize int32) *PartitionConsumerMapping {
 // 2. allow one consumer instance to be down unexpectedly
 //    without affecting the processing power utilization
 
-func (pcm *PartitionConsumerMapping) BalanceToConsumerInstanceIds(partitions []*topic.Partition, consumerInstanceIds []string) {
-	if len(partitions) == 0 || len(consumerInstanceIds) == 0 {
+func (pcm *PartitionConsumerMapping) BalanceToConsumerInstanceIds(partitionSlotToBrokerList *pub_balancer.PartitionSlotToBrokerList, consumerInstanceIds []string) {
+	if len(partitionSlotToBrokerList.PartitionSlots) == 0 || len(consumerInstanceIds) == 0 {
 		return
 	}
 	newVersion := time.Now().UnixNano()
-	newMapping := NewPartitionSlotToConsumerInstanceList(partitions[0].RingSize, newVersion)
+	newMapping := NewPartitionSlotToConsumerInstanceList(partitionSlotToBrokerList.RingSize, newVersion)
 	var prevMapping *PartitionSlotToConsumerInstanceList
 	if len(pcm.prevMappings) > 0 {
 		prevMapping = pcm.prevMappings[len(pcm.prevMappings)-1]
 	} else {
 		prevMapping = nil
 	}
-	newMapping.PartitionSlots = doBalanceSticky(partitions, consumerInstanceIds, prevMapping)
+	newMapping.PartitionSlots = doBalanceSticky(partitionSlotToBrokerList.PartitionSlots, consumerInstanceIds, prevMapping)
 	if pcm.currentMapping != nil {
 		pcm.prevMappings = append(pcm.prevMappings, pcm.currentMapping)
 		if len(pcm.prevMappings) > 10 {
@@ -45,7 +45,7 @@ func (pcm *PartitionConsumerMapping) BalanceToConsumerInstanceIds(partitions []*
 	pcm.currentMapping = newMapping
 }
 
-func doBalanceSticky(partitions []*topic.Partition, consumerInstanceIds []string, prevMapping *PartitionSlotToConsumerInstanceList) (partitionSlots []*PartitionSlotToConsumerInstance) {
+func doBalanceSticky(partitions []*pub_balancer.PartitionSlotToBroker, consumerInstanceIds []string, prevMapping *PartitionSlotToConsumerInstanceList) (partitionSlots []*PartitionSlotToConsumerInstance) {
 	// collect previous consumer instance ids
 	prevConsumerInstanceIds := make(map[string]struct{})
 	if prevMapping != nil {
@@ -79,7 +79,14 @@ func doBalanceSticky(partitions []*topic.Partition, consumerInstanceIds []string
 	}
 
 	// make a copy of old mapping, skipping the deleted consumer instances
-	newPartitionSlots := ToPartitionSlots(partitions)
+	newPartitionSlots := make([]*PartitionSlotToConsumerInstance, 0, len(partitions))
+	for _, partition := range partitions {
+		newPartitionSlots = append(newPartitionSlots, &PartitionSlotToConsumerInstance{
+			RangeStart: partition.RangeStart,
+			RangeStop:  partition.RangeStop,
+			Broker:     partition.AssignedBroker,
+		})
+	}
 	for _, newPartitionSlot := range newPartitionSlots {
 		key := fmt.Sprintf("%d-%d", newPartitionSlot.RangeStart, newPartitionSlot.RangeStop)
 		if prevPartitionSlot, ok := prevPartitionSlotMap[key]; ok {

weed/mq/sub_coordinator/partition_consumer_mapping_test.go

@@ -1,14 +1,14 @@
 package sub_coordinator
 
 import (
-	"github.com/seaweedfs/seaweedfs/weed/mq/topic"
+	"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
 	"reflect"
 	"testing"
 )
 
 func Test_doBalanceSticky(t *testing.T) {
 	type args struct {
-		partitions          []*topic.Partition
+		partitions          []*pub_balancer.PartitionSlotToBroker
 		consumerInstanceIds []string
 		prevMapping         *PartitionSlotToConsumerInstanceList
 	}
@@ -20,7 +20,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "1 consumer instance, 1 partition",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  100,
@@ -40,7 +40,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 1 partition",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  100,
@@ -60,7 +60,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "1 consumer instance, 2 partitions",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,
@@ -89,7 +89,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 2 partitions",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,
@@ -118,7 +118,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 2 partitions, 1 deleted consumer instance",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,
@@ -160,7 +160,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 2 partitions, 1 new consumer instance",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,
@@ -202,7 +202,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 2 partitions, 1 new partition",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,
@@ -253,7 +253,7 @@ func Test_doBalanceSticky(t *testing.T) {
 		{
 			name: "2 consumer instances, 2 partitions, 1 new partition, 1 new consumer instance",
 			args: args{
-				partitions: []*topic.Partition{
+				partitions: []*pub_balancer.PartitionSlotToBroker{
 					{
 						RangeStart: 0,
 						RangeStop:  50,

weed/mq/sub_coordinator/partition_list.go

@@ -5,6 +5,7 @@ import "github.com/seaweedfs/seaweedfs/weed/mq/topic"
 type PartitionSlotToConsumerInstance struct {
 	RangeStart         int32
 	RangeStop          int32
+	Broker             string
 	AssignedInstanceId string
 }
 
@@ -21,16 +22,6 @@ func NewPartitionSlotToConsumerInstanceList(ringSize int32, version int64) *Part
 	}
 }
 
-func ToPartitionSlots(partitions []*topic.Partition) (partitionSlots []*PartitionSlotToConsumerInstance) {
-	for _, partition := range partitions {
-		partitionSlots = append(partitionSlots, &PartitionSlotToConsumerInstance{
-			RangeStart: partition.RangeStart,
-			RangeStop:  partition.RangeStop,
-		})
-	}
-	return
-}
-
 func ToPartitions(ringSize int32, slots []*PartitionSlotToConsumerInstance, unixTimeNs int64) []*topic.Partition {
 	partitions := make([]*topic.Partition, 0, len(slots))
 	for _, slot := range slots {