mysql docker容器的JDBC通信链接失败

Question

当我的java spring应用程序尝试连接到数据库时，我会得到以下信息：

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如下所示：

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: supersede_orchestrator_spring
      MYSQL_USER: supersede_orch
      MYSQL_PASSWORD: ****
      MYSQL_ROOT_PASSWORD: ****
    container_name: orchestrator_mysqldbserver
networks:
  mt-network:
    driver: bridge

FROM java:8-jre

VOLUME /tmp
ADD build/libs/feedback_orchestrator-2.0.0.jar app.jar

RUN apt-get update
RUN apt-get install mysql-client -y
RUN apt-get install libmysql-java -y

RUN bash -c 'touch /app.jar'

ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom -Djava.net.preferIPv4Stack=true","-jar","/app.jar"]

最后，docker图像-A：

42db4e656e6e        orchestrator_springappserver   "java '-Djava.secu..."   16 minutes ago      Up 16 minutes             0.0.0.0:8081->8080/tcp    orchestrator_springappserver_1
e2b0b5cc15ac        orchestrator_mysqldbserver     "docker-entrypoint..."   2 hours ago         Up About an hour          0.0.0.0:13306->3306/tcp   orchestrator_mysqldbserver

你知道问题是什么吗？谢谢你！

Answer 1

上面的配置是正确的。我只是愚蠢到忘记了重建罐子。因此，没有更新jdbc url。它现在工作得很好。