从谷歌应用程序引擎（春季启动应用程序）无法连接到谷歌云的SQL（第二代）

Question

最近一直让我疯狂，希望任何人都可以帮助我。

我一直试图从谷歌应用程序引擎（春季启动应用程序）连接到谷歌云（第二代），但没有运气。我按照此页上的说明https://cloud.google.com/appengine/docs/flexible/java/using-cloud-sql获取连接字符串。从我的本地计算机连接到谷歌云sql是很好的。

此外，我的应用程序引擎和谷歌sql实例来自同一个项目。我也验证了我可以连接到谷歌SQL从谷歌应用程序引擎的云壳

我想知道哪个是正确的连接字符串使用。我想这两个连接模板，但没有得到任何运气

• “的jdbc：谷歌的：mysql：// $ {INSTANCE_CONNECTION_NAME}/$ {}数据库用户= $ {}用户密码& = $ {}密码？ “

• ” 的jdbc：mysql的：//谷歌/ $ {}数据库= useSSL假& cloudSqlInstance = $ {} INSTANCE_CONNECTION_NAME &的SocketFactory = com.google.cloud.sql.mysql.SocketFactory &用户= $ {用户} & password = $ {password}“

这是从谷歌云日志迹：

017-11-17 00:20:51 default[20171117t071753]  at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131] 

2017年11月17日0时20分五十一秒默认[20171117t071753]所致：com.mysql.jdbc.exceptions.jdbc4.CommunicationsException：通信链路失败 2017-11-17 00:20:51默认[20171117t071753] 2017-11-17 00:20:51默认[20171117t071753]成功发送到服务器的最后一个数据包是0毫秒前。驱动程序尚未收到来自服务器的任何数据包。 2017-11-17 00:20:51默认[20171117t071753] at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method）〜[na：1.8.0_131] 2017-11-17 00:20:51默认[20171117t071753] at sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:62）〜[na：1.8.0_131] 2017-11-17 00:20:51 default [20171117t071753] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java ：45）〜[na：1.8.0_131] 2017-11-17 00:20:51默认[20171117t071753] at java.lang.reflect.Constructor.newInstance（Constructor.java:423）〜[na：1.8.0_131 ] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc.Util.handleNewInstance（Util.java:425）〜[mysql-connector-java-5.1.43.jar！/：5.1 .43] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc.SQLError.createC ommunicationsException（SQLError.java:989）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc。 MysqlIO。（MysqlIO.java:341）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc .ConnectionImpl.coreConnect（ConnectionImpl.java:2196）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql .jdbc.ConnectionImpl.connectOneTryOnly（ConnectionImpl.java:2229）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51 default [20171117t071753] at com .mysql.jdbc.ConnectionImpl.createNewIO（ConnectionImpl.java:2024）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51 default [20171117t071753]在com.mysql.jdbc.ConnectionImpl。（ConnectionImpl.java:779）〜[mysql-connector-java-5.1.43。 jar！/：5.1.43] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc.JDBC4Connection。（JDBC4Connection.java:47）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51 default [20171117t071753] at sun.reflect.NativeConstructorAccessorImpl.newInstance0 （Native Method）〜[na：1.8.0_131] 2017-11-17 00:20:51 default [20171117t071753] at sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:62）〜[na：1.8.0_131] 2017-11-17 00:20:51默认[20171117t071753] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）〜[na：1.8.0_131] 2017-11-17 00:20:51 default [20171117t071753] at java.lang.reflect.Constructor.newInstance（Constructor.java:423）〜[na：1.8.0_131] 2017-11-17 00:20:51默认[20171117t071753] at com.mysql.jdbc。 Util.handleNewInstance（Util.java:425）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-1 7 00:20:51 default [20171117t071753] at com.mysql.jdbc.ConnectionImpl.getInstance（ConnectionImpl.java:389）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017- 11-17 00:20:51 default [20171117t071753] at com.mysql.jdbc.NonRegisteringDriver.connect（NonRegisteringDriver.java:330）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] 2017-11-17 00:20:51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver（PooledConnection.java:310）〜[tomcat-jdbc-8.5.16.jar！/：na ] 2017-11-17 00:20:51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.PooledConnection.connect（PooledConnection.java:203）〜[tomcat-jdbc-8.5.16.jar！/ ：na] 2017-11-17 00:20:51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection（ConnectionPool.java:735）〜[tomcat-jdbc-8.5.16.jar ！/：na] 2017-11-17 00:20:51预设[20 171117t071753] at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection（ConnectionPool.java:667）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11-17 00:20:51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.ConnectionPool.init（ConnectionPool.java:482）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11-17 00:20 ：51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.ConnectionPool。（ConnectionPool.java:154）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11-17 00： 20:51 default [20171117t071753] at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool（DataSourceProxy.java:118）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11-17 00:20:51默认[20171117t071753] at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool（DataSourceProxy.java:107）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11 -17 00:20:51默认[20171117t071753]位于org.apache.tomcat.jdbc.pool.DataSourc eProxy.getConnection（DataSourceProxy.java:131）〜[tomcat-jdbc-8.5.16.jar！/：na] 2017-11-17 00:20:51默认[20171117t071753]位于org.springframework.jdbc.datasource。 DataSourceUtils.doGetConnection（DataSourceUtils.java:111）〜[spring-jdbc-4.3.10.RELEASE.jar！/：4.3.10.RELEASE] 2017-11-17 00:20:51默认[20171117t071753] at org。 springframework.jdbc.datasource.DataSourceUtils.getConnection（DataSourceUtils.java:77）〜[spring-jdbc-4.3.10.RELEASE.jar！/：4.3.10.RELEASE] 2017-11-17 00:20:51 default [20171117t071753] ... 29个常见框架遗漏 2017-11-17 00:20:51默认[20171117t071753]由java.net.UnknownHostException造成：google.net.InetAddress.getAllByName0（InetAddress.java:1280） 〜[na：1.8.0_131] at java.net.InetAddress.getAllByName（InetAddress.java:1192）〜[na：1.8.0_131] at java.net.InetAddress.getAllByName（InetAddress.java:1126）〜[na： 1.8.0_131]在com.mysq l.jdbc.StandardSocketFactory.connect（StandardSocketFactory.java:188）〜[mysql-connector-java-5.1.43.jar！/：5.1.43] at com.mysql.jdbc.MysqlIO。（MysqlIO.java:300） 〜[mysql-connector-java-5.1.43.jar！/：5.1.43]

Answer 1

在我的应用程序属性中，我使用jdbc：mysql：// [host]：[port]/[dbname]？autoReconnect = true &对于url属性，useSSL = false并且工作正常。

但在我看来，你的错误是由于你必须在你的cloud-sql实例的授权部分授权你的app-engine的IP地址。

Configuring IP Access on Cloud SQL instance