小编rsd*_*dev的帖子

当我的java spring应用程序尝试连接到数据库时，我得到以下信息：

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

spring应用程序中的连接URL如下：

jdbc：mysql：// mysqldbserver：3306 / supersede_orchestrator_spring？useSSL = false＆autoReconnect = true＆failOverReadOnly = false＆maxReconnects = 10

其中mysqldbserver是docker-compose配置中的服务名称：

version : '3'
services:
  springappserver:
    build:
      context: .
      dockerfile: web.dockerfile
    ports:
      - "8081:8080"
    networks:
      - mt-network
    volumes:
      - .:/vol/development
    depends_on:
      - mysqldbserver
  mysqldbserver:
    build:
      context: .
      dockerfile: db.dockerfile
    ports:
      - "13306:3306"
    networks:
      - mt-network
    environment:
      MYSQL_DATABASE: …