使用 Cloud SQL：MySQL 从 Google Cloud Run 部署时出现通信链路故障错误

【问题标题】：Communications link failure error while deploying from Google Cloud Run with Cloud SQL:MySQL使用 Cloud SQL：MySQL 从 Google Cloud Run 部署时出现通信链路故障错误
【发布时间】：2021-04-13 22:56:10
【问题描述】：

按照此链接在 spring-boot 应用程序中使用 Cloud Build 和 GitHub 操作进行持续部署。

petomalina.medium.com/

一切正常，除了服务尝试使用以下命令访问数据库进行部署。

gcloud run deploy my-service \
          --region europe-west1 \
          --image gcr.io/${{ secrets.GCP_PROJECT_ID }}/my-service \
          --platform managed \
          --allow-unauthenticated \
          --project ${{ secrets.GCP_PROJECT_ID }} \
          --add-cloudsql-instances [instance-name] \
          --set-env-vars DATASOURCE_URL=jdbc:mysql://google/[dbname]?cloudSqlInstance=[instance-name]&socketFactory=com.google.cloud.sql.mysql.SocketFactory&useSSL=false

我还针对服务帐户添加了 Cloud SQL 客户端的角色，尝试同时使用公共 ip、私有 ip 和这种格式 jdbc:mysql://google/[dbname]?cloudSqlInstance=[instance-name]&socketFactory=com.google.cloud.sql.mysql.SocketFactory&useSSL=false

这是我的app.prop 文件：

spring.datasource.url=${DATASOURCE_URL}
spring.datasource.username=sa
spring.datasource.password=pswd
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

但它仍然给出了这个错误：

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.
com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
[mysql-connector-java-8.0.22.jar!/:8.0.22] com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
[mysql-connector-java-8.0.22.jar!/:8.0.22] com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
[mysql-connector-java-8.0.22.jar!/:8.0.22] com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
[mysql-connector-java-8.0.22.jar!/:8.0.22] com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
[mysql-connector-java-8.0.22.jar!/:8.0.22] com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) [mysql-connector-java-8.0.22.jar!/:8.0.22]

有人可以指点我正确的方向吗？

这些是添加的依赖项：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
    </dependency>
    <dependency>
        <groupId>org.json</groupId>
        <artifactId>json</artifactId>
        <version>20160810</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

我也添加了这个：

<dependency>
      <!-- MySQL Socket Factory for Cloud SQL -->
      <groupId>com.google.cloud.sql</groupId>
      <artifactId>mysql-socket-factory</artifactId> 
      <version>1.0.3</version>
</dependency>

现在错误变成了这样：

[nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception
[Request processing failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: \
Unable to acquire JDBC Connection; nested exception is org.hibernate.exception.JDBCConnectionException: \
Unable to acquire JDBC Connection] with root cause
java.net.SocketTimeoutException: connect timed out at java.net.PlainSocketImpl.socketConnect(Native Method)
[na:1.8.0_202] at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) 
[na:1.8.0_202] at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
[na:1.8.0_202] at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
[na:1.8.0_202] at java.net.SocksSocketImpl.connect(Unknown Source)
[na:1.8.0_202] at java.net.Socket.connect(Unknown Source)
[na:1.8.0_202] at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:63)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:956)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) 
[mysql-connector-java-8.0.22.jar!/:8.0.22] at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:358)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:477)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:560)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
[HikariCP-3.4.5.jar!/:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112)
[HikariCP-3.4.5.jar!/:na] at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:38)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:108)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:138)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:50)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:149)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:176)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2104)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2041)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2019)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.doQuery(Loader.java:948)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:349)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.doList(Loader.java:2850)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.doList(Loader.java:2832)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2664)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.Loader.list(Loader.java:2659)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:506)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:400)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:219)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1414)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1565)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1533)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.hibernate.query.Query.getResultList(Query.java:165)
[hibernate-core-5.4.23.Final.jar!/:5.4.23.Final] at org.springframework.data.jpa.repository.query.JpaQueryExecution$PagedExecution.doExecute(JpaQueryExecution.java:177)
[spring-data-jpa-2.4.1.jar!/:2.4.1] at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:88)
[spring-data-jpa-2.4.1.jar!/:2.4.1] at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:155)
[spring-data-jpa-2.4.1.jar!/:2.4.1] at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:143)
[spring-data-jpa-2.4.1.jar!/:2.4.1] at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:137)
[spring-data-commons-2.4.1.jar!/:2.4.1] at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:121)
[spring-data-commons-2.4.1.jar!/:2.4.1] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:152)
[spring-data-commons-2.4.1.jar!/:2.4.1] at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:131)
[spring-data-commons-2.4.1.jar!/:2.4.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80)
[spring-data-commons-2.4.1.jar!/:2.4.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:371)
[spring-tx-5.3.1.jar!/:5.3.1] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:134)
[spring-tx-5.3.1.jar!/:5.3.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
[spring-tx-5.3.1.jar!/:5.3.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:145)
[spring-data-jpa-2.4.1.jar!/:2.4.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
[spring-aop-5.3.1.jar!/:5.3.1] at com.sun.proxy.$Proxy121.fetchRestaurants(Unknown Source)
[na:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[na:1.8.0_202] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
[na:1.8.0_202] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[na:1.8.0_202] at java.lang.reflect.Method.invoke(Unknown Source)
[na:1.8.0_202] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
[spring-aop-5.3.1.jar!/:5.3.1] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
[spring-aop-5.3.1.jar!/:5.3.1] at com.sun.proxy.$Proxy62.fetchRestaurants(Unknown Source)
[na:na] at october.foods.services.restaurant.RestaurantService.fetchRestaurants(RestaurantService.java:100)
[classes!/:0.0.1-SNAPSHOT] at october.foods.controller.restaurant.RestaurantController.fetchRestaurants(RestaurantController.java:50)
[classes!/:0.0.1-SNAPSHOT] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[na:1.8.0_202] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
[na:1.8.0_202] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[na:1.8.0_202] at java.lang.reflect.Method.invoke(Unknown Source)
[na:1.8.0_202] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)
[spring-web-5.3.1.jar!/:5.3.1] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)
[spring-web-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:807)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1061)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:961)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
[spring-webmvc-5.3.1.jar!/:5.3.1] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
[spring-webmvc-5.3.1.jar!/:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
[tomcat-embed-core-9.0.39.jar!/:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
[spring-webmvc-5.3.1.jar!/:5.3.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
[tomcat-embed-core-9.0.39.jar!/:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) 
[tomcat-embed-websocket-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
[spring-web-5.3.1.jar!/:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.3.1.jar!/:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
[spring-web-5.3.1.jar!/:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.3.1.jar!/:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
[spring-web-5.3.1.jar!/:5.3.1] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
[spring-web-5.3.1.jar!/:5.3.1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[na:1.8.0_202] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[na:1.8.0_202] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
[tomcat-embed-core-9.0.39.jar!/:9.0.39] at java.lang.Thread.run(Unknown Source) [na:1.8.0_202]

按照 Andrew 的建议，添加了 ConnectionPoolContextListener，

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
import javax.sql.DataSource;

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;

@WebListener("Creates a connection pool that is stored in the Servlet's context for later use.")
public class ConnectionPoolContextListener implements ServletContextListener {
  
  private static final String CLOUD_SQL_CONNECTION_NAME = "CLOUD_SQL_CONNECTION_NAME";
  private static final String DB_USER = "DB_USER";
  private static final String DB_PASS = "DB_PASS";
  private static final String DB_NAME = "DB_NAME";

  private DataSource createConnectionPool() {
    // [START cloud_sql_mysql_servlet_create]
    // The configuration object specifies behaviors for the connection pool.
    HikariConfig config = new HikariConfig();

    // The following URL is equivalent to setting the config options below:
    // jdbc:mysql:///<DB_NAME>?cloudSqlInstance=<CLOUD_SQL_CONNECTION_NAME>&
    // socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=<DB_USER>&password=<DB_PASS>
    // See the link below for more info on building a JDBC URL for the Cloud SQL JDBC Socket Factory
    // https://github.com/GoogleCloudPlatform/cloud-sql-jdbc-socket-factory#creating-the-jdbc-url

    // Configure which instance and what database user to connect with.
    config.setJdbcUrl(String.format("jdbc:mysql:///%s", DB_NAME));
    config.setUsername(DB_USER); // e.g. "root", "mysql"
    config.setPassword(DB_PASS); // e.g. "my-password"

    // For Java users, the Cloud SQL JDBC Socket Factory can provide authenticated connections.
    // See https://github.com/GoogleCloudPlatform/cloud-sql-jdbc-socket-factory for details.
    config.addDataSourceProperty("socketFactory", "com.google.cloud.sql.mysql.SocketFactory");
    config.addDataSourceProperty("cloudSqlInstance", CLOUD_SQL_CONNECTION_NAME);

    // The ipTypes argument can be used to specify a comma delimited list of preferred IP types 
    // for connecting to a Cloud SQL instance. The argument ipTypes=PRIVATE will force the 
    // SocketFactory to connect with an instance's associated private IP. 
    config.addDataSourceProperty("ipTypes", "PUBLIC,PRIVATE");

    // ... Specify additional connection properties here.
    // [START_EXCLUDE]

    // [START cloud_sql_mysql_servlet_limit]
    // maximumPoolSize limits the total number of concurrent connections this pool will keep. Ideal
    // values for this setting are highly variable on app design, infrastructure, and database.
    config.setMaximumPoolSize(5);
    // minimumIdle is the minimum number of idle connections Hikari maintains in the pool.
    // Additional connections will be established to meet this value unless the pool is full.
    config.setMinimumIdle(5);
    // [END cloud_sql_mysql_servlet_limit]

    // [START cloud_sql_mysql_servlet_timeout]
    // setConnectionTimeout is the maximum number of milliseconds to wait for a connection checkout.
    // Any attempt to retrieve a connection from this pool that exceeds the set limit will throw an
    // SQLException.
    config.setConnectionTimeout(10000); // 10 seconds
    // idleTimeout is the maximum amount of time a connection can sit in the pool. Connections that
    // sit idle for this many milliseconds are retried if minimumIdle is exceeded.
    config.setIdleTimeout(600000); // 10 minutes
    // [END cloud_sql_mysql_servlet_timeout]

    // [START cloud_sql_mysql_servlet_backoff]
    // Hikari automatically delays between failed connection attempts, eventually reaching a
    // maximum delay of `connectionTimeout / 2` between attempts.
    // [END cloud_sql_mysql_servlet_backoff]

    // [START cloud_sql_mysql_servlet_lifetime]
    // maxLifetime is the maximum possible lifetime of a connection in the pool. Connections that
    // live longer than this many milliseconds will be closed and reestablished between uses. This
    // value should be several minutes shorter than the database's timeout value to avoid unexpected
    // terminations.
    config.setMaxLifetime(1800000); // 30 minutes
    // [END cloud_sql_mysql_servlet_lifetime]

    // [END_EXCLUDE]

    // Initialize the connection pool using the configuration object.
    DataSource pool = new HikariDataSource(config);
    // [END cloud_sql_mysql_servlet_create]
    return pool;
  }

  @Override
  public void contextDestroyed(ServletContextEvent event) {
    // This function is called when the Servlet is destroyed.
    HikariDataSource pool = (HikariDataSource) event.getServletContext().getAttribute("my-pool");
    if (pool != null) {
      pool.close();
    }
  }

  @Override
  public void contextInitialized(ServletContextEvent event) {
    // This function is called when the application starts and will safely create a connection pool
    // that can be used to connect to.
    ServletContext servletContext = event.getServletContext();
    DataSource pool = (DataSource) servletContext.getAttribute("my-pool");
    if (pool == null) {
      pool = createConnectionPool();
      servletContext.setAttribute("my-pool", pool);
    }
  }
}

现在错误已更改为：

com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
... 33 common frames omitted
Caused by: java.net.SocketTimeoutException: connect timed out
java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_202]
java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:1.8.0_202]
java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.8.0_202]
java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_202]
java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.8.0_202]
java.net.Socket.connect(Unknown Source) ~[na:1.8.0_202]
com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]
com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:63) ~[mysql-connector-java-8.0.22.jar!/:8.0.22]

虽然使用 ConnectionPoolContextListener 在本地工作

【问题讨论】：

  • 你能分享你的依赖吗？

标签： spring-boot google-cloud-sql google-cloud-run


【解决方案1】：

java.net.SocketTimeoutException 是指在接收到远程主机的响应之前连接超时。原因可能是本地网络问题、代理或防火墙配置不正确。如果您使用的是私有 IP，则需要检查 docker bridge 网络的 IP 范围。这是documentation 所说的：

如果客户端无法使用私有 IP 连接到 Cloud SQL 实例，请检查客户端是否使用 172.17.0.0/16 范围内的任何 IP。从 172.17.0.0/16 范围内的任何 IP 到使用私有 IP 的 Cloud SQL 实例的连接失败。同样，使用该范围内的 IP 创建的 Cloud SQL 实例也无法访问。这个范围是为 docker bridge 网络保留的。

要解决您遇到的一些问题，请按照文档here 并发布您收到的任何错误消息，例如，您可以尝试：

尝试使用gcloud sql connect 命令连接到您的实例。此命令会在短时间内授权您的 IP 地址。您可以在安装了 Cloud SDK 和 mysql 客户端的环境中运行此命令。您也可以在 Cloud Shell 中运行此命令，该命令可在 Google Cloud Console 中使用，并且预装了 Cloud SDK 和 mysql 客户端。

暂时允许所有 IP 地址连接到实例。对于 IPv4 授权 0.0.0.0/0（对于 IPv6，授权 ::/0。测试完后，请确保再次删除它，因为它向世界开放！

你在用connection pools吗？

如果没有，我会创建一个连接缓存，以便当您的应用程序需要链接到数据库时，它可以从池中获取临时连接。应用程序完成操作后，连接将再次返回池以供以后使用。为使其正常工作，连接需要为 open and closed efficiently 并且不浪费任何资源。

【讨论】：

  • 按照您的建议，我已经编辑了这个问题。可以请教吗？
  • java.net.SocketTimeoutException: Connection timed out exception while communicating with the server. 您是否检查过防火墙规则并查看服务器是否正在运行？他们似乎没有相互交流。
  • 但它在本地与云 SQL 一起工作。请让我知道我需要检查哪些服务器防火墙规则？
  • 如果您可以在 GitHub 上分享您的代码，这可能有助于诊断问题。
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