diff --git a/pkg/mq/mqimpl/rocksmq/server/rocksmq_impl.go b/pkg/mq/mqimpl/rocksmq/server/rocksmq_impl.go
index c259ffc4452ba..caed2e9e4ce14 100644
--- a/pkg/mq/mqimpl/rocksmq/server/rocksmq_impl.go
+++ b/pkg/mq/mqimpl/rocksmq/server/rocksmq_impl.go
@@ -508,7 +508,7 @@ func (rmq *rocksmq) CreateTopic(topicName string) error {
 
 	topicMu.LoadOrStore(topicName, new(sync.Mutex))
 
-	rmq.consumers.Store(topicName, newConsumerList())
+	rmq.consumers.LoadOrStore(topicName, newConsumerList())
 	// msgSizeKey -> msgSize
 	// topicIDKey -> topic creating time
 	kvs := make(map[string]string)
@@ -638,12 +638,13 @@ func (rmq *rocksmq) RegisterConsumer(consumer *Consumer) error {
 	defer mu.Unlock()
 
 	start := time.Now()
-	if val, ok := rmq.consumers.Load(consumer.Topic); ok {
-		val.(*consumerList).Add(consumer)
-	} else {
-		log.Warn("create consumer for unknown topic", zap.String("topic", consumer.Topic), zap.String("group", consumer.GroupName))
-		return fmt.Errorf("create consumer for unknown topic: %s, group: %s", consumer.Topic, consumer.GroupName)
+
+	val, ok := rmq.consumers.LoadOrStore(consumer.Topic, newConsumerList())
+	if !ok {
+		log.Warn("create consumer for topic not exist", zap.String("topic", consumer.Topic), zap.String("group", consumer.GroupName))
 	}
+	val.(*consumerList).Add(consumer)
+
 	log.Ctx(rmq.ctx).Debug("Rocksmq register consumer successfully ", zap.String("topic", consumer.Topic), zap.String("group", consumer.GroupName), zap.Int64("elapsed", time.Since(start).Milliseconds()))
 	return nil
 }