Add retry mechanism to mongoDB, Redis, Kafka

pkg/common/db/cache/init_redis_test.go

@@ -27,4 +27,10 @@ func TestNewRedis(t *testing.T) {
 		fmt.Println("config load error")
 		return
 	}
+	redis, err := NewRedis()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(redis)
 }

pkg/common/kafka/producer.go

@@ -76,6 +76,9 @@ func NewKafkaProducer(addr []string, topic string) *Producer {
 		//}
 		time.Sleep(time.Duration(1) * time.Second)
 	}
+	if err != nil {
+		panic(err.Error())
+	}
 	p.producer = producer
 	return &p
 }