问题
I try to run a Springboot app with mysql connection on Docker. Without docker, it works well. But when I try to deploy on a container, I have com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure.
I use this docker-compose:
version: '3'
services:
nginx:
container_name: nginx
image: nginx:latest
restart: always
ports:
- 80:80
- 443:443
volumes:
- ./nginx/conf.d:/etc/nginx/conf.d
depends_on:
- spring-boot-app
mysql:
container_name: mysql
image: mysql:latest
environment:
MYSQL_ROOT_PASSWORD: "rootpass"
MYSQL_DATABASE: "db"
MYSQL_USER: "user"
MYSQL_PASSWORD: "pass"
ports:
- "1306:3306"
volumes:
- ./data/:/var/lib/mysql
networks:
- mysql-db
restart: always
spring-boot-app:
container_name: spring-boot-app
image: spring-boot-app
build:
context: ./spring-boot-app
dockerfile: Dockerfile
ports:
- "8080:8080"
depends_on:
- mysql
networks:
- mysql-db
restart: always
networks:
mysql-db:
driver: bridge
Here is the Dockerfile for springboot app:
FROM openjdk:11
COPY target/spring-boot-app.jar /spring-boot-app/spring-boot-app.jar
ENTRYPOINT [ "java", "-jar", "-Dspring.profiles.active=prod","/spring-boot-app/spring-boot-app.jar" ]
And finally, here is application.properties:
spring.datasource.url = jdbc:mysql://mysql:1306/db
spring.datasource.username = user
spring.datasource.password = pass
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
server.port=8080
I don't think this is a port problem because i tried to set mysql to default port (3306), and it still doesn't work.
If it can help, here is docker ps :
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
08ea16361c61 nginx:latest "nginx -g 'daemon of…" 1 second ago Up Less than a second 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp nginx
52ef8d5c2127 spring-boot-app "java -jar -Dspring.…" 3 seconds ago Up 1 second 0.0.0.0:8080->8080/tcp spring-boot-app
7bbcdc1fae3c mysql:latest "docker-entrypoint.s…" 4 seconds ago Up 3 seconds 33060/tcp, 0.0.0.0:1306->3306/tcp mysql
Edit : full stacktrace :
ubuntu@ubuntu:~/Documents/SpringBoot$ docker-compose up
Creating network "springboot_mysql-db" with driver "bridge"
Creating mysql ... done
Creating spring-boot-app ... done
Attaching to mysql, spring-boot-app
mysql | 2019-05-27T21:50:19.645920Z 0 [Warning] [MY-011070] [Server] 'Disabling symbolic links using --skip-symbolic-links (or equivalent) is the default. Consider not using this option as it' is deprecated and will be removed in a future release.
mysql | 2019-05-27T21:50:19.645986Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.16) starting as process 1
mysql | 2019-05-27T21:50:20.451523Z 0 [System] [MY-010229] [Server] Starting crash recovery...
mysql | 2019-05-27T21:50:20.466040Z 0 [System] [MY-010232] [Server] Crash recovery finished.
mysql | 2019-05-27T21:50:20.544487Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
mysql | 2019-05-27T21:50:20.551894Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
mysql | 2019-05-27T21:50:20.584210Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.16' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
mysql | 2019-05-27T21:50:20.682338Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: '/var/run/mysqld/mysqlx.sock' bind-address: '::' port: 33060
spring-boot-app |
spring-boot-app | . ____ _ __ _ _
spring-boot-app | /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
spring-boot-app | ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
spring-boot-app | \\/ ___)| |_)| | | | | || (_| | ) ) ) )
spring-boot-app | ' |____| .__|_| |_|_| |_\__, | / / / /
spring-boot-app | =========|_|==============|___/=/_/_/_/
spring-boot-app | :: Spring Boot :: (v2.1.5.RELEASE)
spring-boot-app |
spring-boot-app | 2019-05-27 21:50:22.884 INFO 1 --- [ main] com.jv.demo.DemoApplication : Starting DemoApplication v0.0.1-SNAPSHOT on c69469fd7461 with PID 1 (/spring-boot-app/spring-boot-app.jar started by root in /)
spring-boot-app | 2019-05-27 21:50:22.903 INFO 1 --- [ main] com.jv.demo.DemoApplication : The following profiles are active: prod
spring-boot-app | 2019-05-27 21:50:25.152 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
spring-boot-app | 2019-05-27 21:50:25.378 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 205ms. Found 1 repository interfaces.
spring-boot-app | 2019-05-27 21:50:26.313 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$e43b97d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
spring-boot-app | 2019-05-27 21:50:27.043 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
spring-boot-app | 2019-05-27 21:50:27.195 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
spring-boot-app | 2019-05-27 21:50:27.196 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
spring-boot-app | 2019-05-27 21:50:27.472 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
spring-boot-app | 2019-05-27 21:50:27.472 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4316 ms
spring-boot-app | 2019-05-27 21:50:27.928 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
spring-boot-app | 2019-05-27 21:50:29.226 ERROR 1 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.
spring-boot-app |
spring-boot-app | com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
spring-boot-app |
spring-boot-app | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
spring-boot-app | at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.2.0.jar!/:na]
spring-boot-app | at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:319) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:356) ~[spring-jdbc-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.DatabaseLookup.getDatabase(DatabaseLookup.java:73) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.JpaProperties.determineDatabase(JpaProperties.java:142) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.jpaVendorAdapter(JpaBaseConfiguration.java:113) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec.CGLIB$jpaVendorAdapter$5(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec$$FastClassBySpringCGLIB$$cb57d9da.invoke(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$2d1a7bec.jpaVendorAdapter(<generated>) ~[spring-boot-autoconfigure-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
spring-boot-app | at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
spring-boot-app | at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.7.RELEASE.jar!/:5.1.7.RELEASE]
spring-boot-app | at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) ~[spring-boot-2.1.5.RELEASE.jar!/:2.1.5.RELEASE]
spring-boot-app | at com.jv.demo.DemoApplication.main(DemoApplication.java:10) ~[classes!/:0.0.1-SNAPSHOT]
spring-boot-app | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
spring-boot-app | at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
spring-boot-app | at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app | at org.springframework.boot.loader.Launcher.launch(Launcher.java:87) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app | at org.springframework.boot.loader.Launcher.launch(Launcher.java:50) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app | at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51) ~[spring-boot-app.jar:0.0.1-SNAPSHOT]
spring-boot-app | Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure
spring-boot-app |
spring-boot-app | The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
spring-boot-app | at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na]
spring-boot-app | at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
spring-boot-app | at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na]
spring-boot-app | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.NativeSession.connect(NativeSession.java:152) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:955) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:825) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | ... 84 common frames omitted
spring-boot-app | Caused by: java.net.ConnectException: Connection refused (Connection refused)
spring-boot-app | at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:na]
spring-boot-app | at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na]
spring-boot-app | at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) ~[na:na]
spring-boot-app | at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) ~[na:na]
spring-boot-app | at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403) ~[na:na]
spring-boot-app | at java.base/java.net.Socket.connect(Socket.java:591) ~[na:na]
spring-boot-app | at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65) ~[mysql-connector-java-8.0.16.jar!/:8.0.16]
spring-boot-app | ... 87 common frames omitted
spring-boot-app |
spring-boot-app | 2019-05-27 21:50:29.234 WARN 1 --- [ main] o.s.b.a.orm.jpa.DatabaseLookup : Unable to determine jdbc url from datasource
spring-boot-app |
spring-boot-app | org.springframework.jdbc.support.MetaDataAccessException: Could not get Connection for extracting meta-data; nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
回答1:
As your Spring Boot application is also launched in a docker image, you can't used the port exposed by docker, but instead you need to use the original port of the image.
In application.properties you need to use:
spring.datasource.url = jdbc:mysql://mysql:3306/db
回答2:
there is a difference between networks and links. use links like the one below
version: '2'
services:
web:
build: .
links:
- "db:database"
db:
image: postgres
this switch will add ID and IP address of one docker container in another on. in this way they can connect to each other. for more info check following link.
来源：https://stackoverflow.com/questions/56340537/docker-springboot-and-mysql-com-mysql-cj-exceptions-cjcommunicationsexception