I am trying to dockerize my spring boot application & mysql database. When i try to docker-compose up, the application giving me this error :

com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
ebankapi-1 |
ebankapi-1 | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

And also when i try to seperately connect to my db container from mysql , it says :

Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

Here is my application.properties:

spring.application.name=e-bank
spring.datasource.url=jdbc:mysql://ebankdb:3307/e-bank
spring.datasource.username=projectserver
spring.datasource.password=projectserver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.generate-ddl=true
spring.jpa.open-in-view=false
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
spring.sql.init.mode=always
logging.level.root=info
logging.level.org.springframework.web=DEBUG

And my Dockerfile :

FROM openjdk:17-slim       
WORKDIR /app  
COPY target/*.jar e-bank.jar  
EXPOSE 8080  
CMD [ "java", "-jar", "e-bank.jar" ]

And my docker-compose.yaml file :

version: "3.8"  
services:  
ebankapi:  
    build: .  
    restart: always  
    ports:  
      - '8080:8080'  
    networks:  
      - ebank-net  
    environment:  
      - spring.datasource.url=jdbc:mysql://ebankdb:3307/e-bank  
    depends_on:  
      - ebankdb  
    volumes:  
      - .m2:/root/.m2  
  ebankdb:  
    image: "mysql:8.0"  
    restart: always  
    ports:  
      - '3307:3306'  
    networks:  
      - ebank-net  
    environment:  
      MYSQL_DATABASE: e-bank  
      MYSQL_USER: projectserver  
      MYSQL_PASSWORD: projectserver  
      MYSQL_ROOT_PASSWORD: root  
networks:  
  ebank-net:

I tried to use ‘3307:3307’ but it did not work

I’ve been searching through questions to find a solution to my problem for one week. But it keep giving me this error. Please someone explain how to configure these files detailly like explaining to a stupid. I will make the working answer accepted immediately.

Thank you !