fix

docker-compose.iot-business.yml

 version: '3.9'
-
 services:
   iot-job: 
     image: registry.cn-hangzhou.aliyuncs.com/hsyl_iot/xxl-job:v3
@@ -14,7 +13,7 @@ services:
     ports:
       - "8520"
     environment:
-      - DB_URL=jdbc:mysql://10.10.39.251:3306:3306/iot_dbapi?useSSL=false&characterEncoding=UTF-8&serverTimezone=GMT%2B8
+      - DB_URL=jdbc:mysql://10.10.39.251:3306/iot_dbapi?useSSL=false&characterEncoding=UTF-8&serverTimezone=GMT%2B8
       - DB_USERNAME=root
       - DB_PASSWORD=huansi@V3
       - DB_DRIVER=com.mysql.cj.jdbc.Driver