add retry for connect kafka

server/node.go

@@ -82,11 +82,20 @@ func (n *Node) Loop(idx int) {
 	// monitor kafka
 	taskCh := make(chan *odysseus.TaskContent, 1000)
 	ctx, cancel := context.WithCancel(context.Background())
-	client, err := n.attachKafkaConsumer(ctx, taskCh)
-	if err != nil {
-		log.WithError(err).Error("attach kafka consumer failed")
-		return
+	var client sarama.ConsumerGroup
+	var err error
+
+	for {
+		client, err = n.attachKafkaConsumer(ctx, taskCh)
+		if err != nil {
+			log.WithError(err).Error("attach kafka consumer failed try again later")
+			time.Sleep(time.Second)
+			continue
+		}
+		break
 	}
+	log.WithField("routine", idx).Info("attach kafka consumer success")
+
 	postResult := func(task *odysseus.TaskContent, result *odysseus.TaskResponse) error {
 		d, _ := proto.Marshal(result)
 		err := utils.Post(task.TaskCallback, d)