Spring 在 Google 云上启动 SQL - org.hibernate.HibernateException：当 'hibernate.dialect' 未设置时，对 DialectResolutionInfo 的访问不能为空

Question

当我运行我在本地主机中的程序远程连接到 Google 云 SQL (MySQL) 时，它可以工作。一旦程序部署在 Google App Engine 中，所有必要的 IAM 权限就位，它会导致错误：

org.hibernate.HibernateException: 未设置 'hibernate.dialect' 时，对 DialectResolutionInfo 的访问不能为空。以下日志：

Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:100) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:254) ~[hibernate-core-5.0.12.Final.jar!/:5.0.12.Final] ... 41 common frames omitted

POM 文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelVersion>4.0.0</modelVersion>

 <groupId>com.myapi</groupId>
 <artifactId>myapi</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <packaging>jar</packaging>

 <name>myapi</name>
 <description>My API</description>

 <parent>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-parent</artifactId>
  <version>1.5.9.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>

 <properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  <java.version>1.8</java.version>

  <INSTANCE_CONNECTION_NAME>myapi:asia-south1:myapidb</INSTANCE_CONNECTION_NAME>
  <user>root</user>
  <password>complicated password</password>
  <database>myapidb</database>
 </properties>

 <dependencies>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
  </dependency>

  <dependency>
   <groupId>org.springframework.security.oauth</groupId>
   <artifactId>spring-security-oauth2</artifactId>
   <version>2.2.1.RELEASE</version>
  </dependency>

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-jpa</artifactId>
  </dependency>

  <!--<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <scope>runtime</scope>
   &lt;!&ndash;<version>8.0.8-dmr</version>&ndash;&gt;
  </dependency>-->

  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>5.1.42</version>
  </dependency>

  <dependency>
   <groupId>org.springframework.security</groupId>
   <artifactId>spring-security-jwt</artifactId>
  </dependency>

  <!--<dependency>
   <groupId>com.google.cloud.sql</groupId>
   <artifactId>mysql-socket-factory-connector-j-6</artifactId>
   <version>1.0.4</version>
  </dependency>-->
  <dependency>
   <groupId>com.google.cloud.sql</groupId>
   <artifactId>mysql-socket-factory</artifactId>
   <version>1.0.4</version>
  </dependency>

  <!--<dependency>
   <groupId>com.google.appengine</groupId>
   <artifactId>appengine-maven-plugin</artifactId>
   <version>1.9.63</version>
  </dependency>-->

  <dependency>
   <groupId>com.google.cloud.tools</groupId>
   <artifactId>appengine-maven-plugin</artifactId>
   <version>1.3.2</version>
  </dependency>



  <!--<dependency>
   <groupId>com.google.cloud.sql</groupId>
   <artifactId>mysql-socket-factory</artifactId>
   &lt;!&ndash;<version>1.0.4</version>&ndash;&gt;
   <version>1.0.5</version>
  </dependency>-->

  <dependency>
   <groupId>com.google.guava</groupId>
   <artifactId>guava</artifactId>
   <version>23.6-jre</version>
  </dependency>


  <!--<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-jdbc</artifactId>
  </dependency>-->

  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-jdbc</artifactId>
  </dependency>


  <!--dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-gcp-starter-sql</artifactId>
   <version>1.0.0.M1</version>
  </dependency>-->

  <dependency>
   <groupId>com.fasterxml.jackson.datatype</groupId>
   <artifactId>jackson-datatype-jsr310</artifactId>
  </dependency>

  <dependency>
   <groupId>com.fasterxml.jackson.module</groupId>
   <artifactId>jackson-module-parameter-names</artifactId>
  </dependency>
  <dependency>
   <groupId>com.fasterxml.jackson.datatype</groupId>
   <artifactId>jackson-datatype-jdk8</artifactId>
  </dependency>

  <dependency>
   <groupId>org.springframework.data</groupId>
   <artifactId>spring-data-jpa</artifactId>
  </dependency>

  <!--<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-gcp</artifactId>
   <version>1.0.0.M2</version>
  </dependency>-->


 </dependencies>

 <!--<repositories>
  <repository>
   <id>spring-milestones</id>
   <name>Spring Milestones</name>
   <url>https://repo.spring.io/libs-milestone</url>
   <snapshots>
    <enabled>false</enabled>
   </snapshots>
  </repository>
 </repositories>-->
 <!--<repositories>
  <repository>
   <id>spring-milestones</id>
   <name>Spring Milestones</name>
   <url>https://repo.spring.io/milestone</url>
   <snapshots>
    <enabled>false</enabled>
   </snapshots>
  </repository>
 </repositories>-->
 <build>
  <plugins>
   <plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
   </plugin>
  </plugins>
 </build>


</project>

Answer 1

您的 JDBC 连接字符串对于 App Engine 可能不正确，Hibernate 无法自动识别方言。请注意，用于本地连接的连接字符串与 App Engine 上的运行时不同。 See docs.

  <system-properties>
    <property name="cloudsql" value="jdbc:google:mysql://${INSTANCE_CONNECTION_NAME}/${database}?user=${user}&amp;password=${password}" />
    <property name="cloudsql-local" value="jdbc:mysql://google/${database}?useSSL=false&amp;cloudSqlInstance=${INSTANCE_CONNECTION_NAME}&amp;socketFactory=com.google.cloud.sql.mysql.SocketFactory&amp;user=${user}&amp;password=${password}" />
  </system-properties>

此外，由于您使用的是 Spring 引导，您可能需要考虑使用 Spring Cloud GCP 连接到云 SQL，它支持自动检测 App Engine 并生成正确的连接字符串。

Answer 2

我自己没有使用 Spring Boot 和 Cloud SQL，但根据一些外部资源，如 [A] 或[B]，你应该在src/main/resources的目录下有一个名为application.properties的文件您的应用程序，在那里，您应该设置一些 spring 属性，例如：

database=mysql
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://google/<DB_NAME>?cloudSqlInstance=<INSTANCE_CONNECTION_NAME>&socketFactory=com.google.cloud.sql.mysql.SocketFactory
spring.datasource.username=<USERNAME>
spring.datasource.password=<PASSWORD>

确保在此 application.properties 文件以及 pom.xml 文件中正确设置名称。

Answer 3

对我来说，这与休眠设置无关。

在 stackdriver 的日志中有一条明确的错误消息以启用 Cloud SQL Admin API:

java.lang.RuntimeException: The Google Cloud SQL API is not enabled for project [<project>]. Please use the Google Developers Console to enable it: https://console.cloud.google.com/apis/api/sqladmin/overview?project=<project>

当 JDBC URL 错误并且您的应用程序无法连接到云 SQL 数据库时，会出现类似的错误消息（如 OP 的 post 中所示） .

Answer 4

添加你的pom.xml：

<dependency>
    <groupId>com.google.cloud.sql</groupId>
    <artifactId>mysql-socket-factory-connector-j-8</artifactId>
    <version>1.0.15</version>
</dependency>

jdbc:mysql:///<DATABASE_NAME>?cloudSqlInstance=<INSTANCE_CONNECTION_NAME>&socketFactory=com.google.cloud.sql.mysql.SocketFactory&useSSL=false&user=<USER_NAME>&password=<USER_PASSWORD>

spring:
    data:
        rest: 
            base-path: /api
    datasource:
        driver-class-name: com.mysql.cj.jdbc.Driver

驱动程序使用这个新的：com.mysql.cj.jdbc.Driver，关于 SocketFactory，它根据提供的 cloudSqlInstance

获取您的实例 IP 地址

Spring 在 Google 云上启动 SQL - org.hibernate.HibernateException：当 'hibernate.dialect' 未设置时，对 DialectResolutionInfo 的访问不能为空

Spring Boot on Google Cloud SQL - org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set

mysql

google-app-engine

google-cloud-sql

spring-boot

google-cloud-platform