aws java mysql_java - AWS EC2 / MySql - spring boot无法从datasource确定jdbc url

我有一个简单的Spring Boot应用程序，我试图在基于Amazon AMI的Amazon EC2实例上部署。它使用MySql数据库(版本8.0.15)。

我在AWS上创建了数据库，当我从本地系统指向它的配置时，它可以工作。我也可以从MySql Workbench访问它。

但是当我将Spring Boot jar文件上传到EC2实例并运行它时，它无法连接到数据库，并显示消息“无法从数据源确定jdbc url”：

2019-05-31 20:51:38.266 WARN 5150 --- [ main] o.s.b.a.orm.jpa.DatabaseLookup : Unable to determine jdbc url from datasource

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

以下是配置中的相关条目：

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

spring.jpa.hibernate.ddl-auto=update

spring.datasource.url=jdbc:mysql://mydbinstance.xxxxxxxx.us-east-2.rds.amazonaws.com:3306/todo_db

spring.datasource.username=root

spring.datasource.password=mypassword

服务器上的java版本是

OpenJDK Runtime Environment (build 1.8.0_201-b09)

在我的本地系统上，java版本是

Java(TM) SE Runtime Environment (build 1.8.0_152-b16)

以下是pom.xml的内容：

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

org.springframework.boot

spring-boot-starter-parent

2.1.1.RELEASE

com.todoapp.com.webservices

restful-web-services

0.0.1-SNAPSHOT

restful-web-services

Todo restful App built in Spring Boot

1.8

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-data-jpa

org.springframework.boot

spring-boot-starter-jdbc

mysql

mysql-connector-java

runtime

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-security

io.jsonwebtoken

jjwt

0.9.1

org.springframework.boot

spring-boot-devtools

runtime

org.springframework.boot

spring-boot-starter-test

test

org.springframework.boot

spring-boot-maven-plugin

这是一个更完整的堆栈跟踪。关于无法读取URL的错误最后会出现。

2019-06-01 02:04:25.434 INFO 14791 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...

2019-06-01 02:04:26.696 ERROR 14791 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.

com.mysql.cj.jdbc.exceptions.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.

at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:455) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:207) ~[mysql-connector-java-8.0.13.jar!/:8.0.13]

at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:136) ~[HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:369) ~[HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:198) ~[HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:467) [HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:541) [HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.pool.HikariPool.(HikariPool.java:115) [HikariCP-3.2.0.jar!/:na]

at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-3.2.0.jar!/:na]

at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:151) [spring-jdbc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) [spring-jdbc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) [spring-jdbc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:319) [spring-jdbc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:356) [spring-jdbc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.DatabaseLookup.getDatabase(DatabaseLookup.java:73) [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.JpaProperties.determineDatabase(JpaProperties.java:142) [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.jpaVendorAdapter(JpaBaseConfiguration.java:112) [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$f5c20854.CGLIB$jpaVendorAdapter$5() [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$f5c20854$$FastClassBySpringCGLIB$$81884254.invoke() [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) [spring-core-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) [spring-context-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration$$EnhancerBySpringCGLIB$$f5c20854.jpaVendorAdapter() [spring-boot-autoconfigure-2.1.1.RELEASE.jar!/:2.1.1.RELEASE]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_212]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_212]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_212]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_212]

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:273) ~[spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1237) ~[spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) ~[spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) [spring-beans-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]