无法将Heroku应用程序连接到Amazon RDS

我已经在Heroku上部署了一个应用程序，我正在尝试连接一个Amazon RDS插件。我已经创建了一个AmazonRDS实例，并在那里上传了我的Mysql数据库。然后我按照heroku文档中描述的所有步骤连接到AmazonRDS，包括授权过程

我还在AmazonRDS附加组件上设置了数据库URL。我能够通过mysql管理工具连接到我的amazon实例（因此凭据和主机地址是正确的）

当我运行我的应用程序时，出现以下异常：

org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
    org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:138)
    org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
    org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
    org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
    org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)
    org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:32)
    org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
    org.postgresql.Driver.makeConnection(Driver.java:393)
    org.postgresql.Driver.connect(Driver.java:267)
    org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
    org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
    org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)
    org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)
    org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
    org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
    org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:71)
    org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
    org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
    org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160)
    org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81)
    org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473)
    org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:60)
    org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction(DefaultJpaDialect.java:70)
    org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:59)
    org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:377)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy19.listPeople(Unknown Source)
    com.example.controller.PersonController.listPeople(PersonController.java:27)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:616)
    org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

root cause

java.net.ConnectException: Connection timed out
    java.net.PlainSocketImpl.socketConnect(Native Method)
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
    java.net.Socket.connect(Socket.java:546)
    java.net.Socket.connect(Socket.java:495)
    java.net.Socket.<init>(Socket.java:392)
    java.net.Socket.<init>(Socket.java:206)
    org.postgresql.core.PGStream.<init>(PGStream.java:62)
    org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76)
    org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
    org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
    org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
    org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)
    org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:32)
    org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
    org.postgresql.Driver.makeConnection(Driver.java:393)
    org.postgresql.Driver.connect(Driver.java:267)
    org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
    org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
    org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)
    org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)
    org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
    org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
    org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:71)
    org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
    org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
    org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:160)
    org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:81)
    org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1473)
    org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:60)
    org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction(DefaultJpaDialect.java:70)
    org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:59)
    org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:377)
    org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    $Proxy19.listPeople(Unknown Source)
    com.example.controller.PersonController.listPeople(PersonController.java:27)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:616)
    org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
        org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
        org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
        org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
        org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
        org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
        org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
        org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

org.postgresql.util.PSQLException:连接被拒绝。检查主机名和端口是否正确，邮政局长是否接受TCP/IP连接。
org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl（ConnectionFactoryImpl.java:138）
org.postgresql.core.ConnectionFactory.openConnection（ConnectionFactory.java:66）
org.postgresql.jdbc2.AbstractJdbc2Connection（AbstractJdbc2Connection.java:125）
AbstractJdbc3Connection（AbstractJdbc3Connection.java:30）
org.postgresql.jdbc3g.AbstractJdbc3gConnection。（AbstractJdbc3gConnection.java:22）
org.postgresql.jdbc4.AbstractJdbc4Connection（AbstractJdbc4Connection.java:32）
Jdbc4Connection（Jdbc4Connection.java:24）
org.postgresql.Driver.makeConnection（Driver.java:393）
org.postgresql.Driver.connect（Driver.java:267）
org.apache.commons.dbcp.DriverConnectionFactory.createConnection（DriverConnectionFactory.java:38）
org.apache.commons.dbcp.PoolableConnectionFactory.makeObject（PoolableConnectionFactory.java:582）
org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory（BasicDataSource.java:1556）
org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory（BasicDataSource.java:1545）
org.apache.commons.dbcp.BasicDataSource.createDataSource（BasicDataSource.java:1388）
org.apache.commons.dbcp.BasicDataSource.getConnection（BasicDataSource.java:1044）
org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection（InjectedDataSourceConnectionProvider.java:71）
org.hibernate.jdbc.ConnectionManager.openConnection（ConnectionManager.java:446）
org.hibernate.jdbc.ConnectionManager.getConnection（ConnectionManager.java:167）
org.hibernate.jdbc.jdbcontext.connection（jdbcontext.java:160）
org.hibernate.transaction.JDBCTransaction.begin（JDBCTransaction.java:81）
org.hibernate.impl.SessionImpl.beginTransaction（SessionImpl.java:1473）
org.hibernate.ejb.TransactionImpl.begin（TransactionImpl.java:60）
org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction（DefaultJpaDialect.java:70）
org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction（HibernateJpaDialect.java:59）
org.springframework.orm.jpa.JpaTransactionManager.doBegin（JpaTransactionManager.java:377）
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction（AbstractPlatformTransactionManager.java:371）
org.springframework.transaction.interceptor.TransactionSpectSupport.createTransactionIfEssential（TransactionSpectSupport.java:335）
org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:105）
org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:172）
org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:202）
$Proxy19.listPeople（未知来源）
com.example.controller.PersonController.listPeople（PersonController.java:27）
sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）
invoke（NativeMethodAccessorImpl.java:57）
sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）
java.lang.reflect.Method.invoke（Method.java:616）
org.springframework.web.method.support.InvocableHandlerMethod.invoke（InvocableHandlerMethod.java:213）
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:126）
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:96）
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:617）
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:578）
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:80）
org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:923）
org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:852）
org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:882）
org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:778）
javaservlet.http.HttpServlet.service（HttpServlet.java:621）
javaservlet.http.HttpServlet.service（HttpServlet.java:722）
根本原因
java.net.ConnectException:连接超时
java.net.PlainSocketImpl.socketConnect（本机方法）
java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:327）
java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:193）
java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:180）
net.socksocketimpl.connect（socksocketimpl.java:384）
java.net.Socket.connect（Socket.java:546）
java.net.Socket.connect（Socket.java:495）
Socket.（Socket.java:392）
Socket.（Socket.java:206）
org.postgresql.core.PGStream.（PGStream.java:62）
org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl（ConnectionFactoryImpl.java:76）
org.postgresql.core.ConnectionFactory.openConnection（ConnectionFactory.jav