Spring Boot JPA - 未設置“hibernate.dialect”時，對 DialectResolutionInfo 的訪問不能為空

Question

我有一個 Spring Boot JPA 應用程序。 每當我嘗試運行它時，它都會失敗：

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-5.3.7.Final.jar:5.3.7.Final]

我在這里查看了相關問題，但大多數似乎與數據庫尚未啟動、憑據不正確等問題有關。但是，我能夠與 PSQL 客戶端連接得很好，所以這不是問題。 我已經嘗試過使用和不使用我的 application.properties 中指定的平台和驅動程序：

spring.datasource.url=jdbc:postgresql://xxxx/my_db
spring.datasource.username=xxx
spring.datasource.password=xxx
spring.jpa.show-sql=true
spring.datasource.driverClassName=org.postgresql.Driver
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect

此外，在錯誤之上，應用程序實際上打印出以下內容：

2019-02-15 10:02:40.134  INFO 43204 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL95Dialect

可能是什么問題？ 這個應用程序實際上正在運行； 但是最近換了開發機器，現在連不上。 我已經禁用了我機器上的防火牆，看看這是否可能是問題，但沒有成功。 同樣，我能夠通過 PSQL 進行連接，所以我真的不知道該怎么想。

堆棧跟蹤：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManager' defined in class path resource [com/midamcorp/insuranceui/AppConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.persistence.EntityManager]: Factory method 'entityManager' threw exception; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)
~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) ~[spring-boot-2.1.2.RELEASE.jar:2.1.2.RELEASE]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.1.2.RELEASE.jar:2.1.2.RELEASE]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) ~[spring-boot-2.1.2.RELEASE.jar:2.1.2.RELEASE]
        at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:139) ~[spring-boot-2.1.2.RELEASE.jar:2.1.2.RELEASE]
        at com.midamcorp.insuranceui.EntryFrame.main(EntryFrame.java:55) ~[main/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.persistence.EntityManager]: Factory method 'entityManager' threw exception; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        ... 17 common frames omitted
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:51) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:100) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:116) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:41) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:58) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.addConnections(DriverManagerConnectionProviderImpl.java:363) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.<init>(DriverManagerConnectionProviderImpl.java:282) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.<init>(DriverManagerConnectionProviderImpl.java:260) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections$Builder.build(DriverManagerConnectionProviderImpl.java:401) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildPool(DriverManagerConnectionProviderImpl.java:112) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:75) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:100) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:179) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:119) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:904) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:935) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:56) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:79) ~[javax.persistence-api-2.2.jar:2.2]
        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54) ~[javax.persistence-api-2.2.jar:2.2]
        at com.midamcorp.insuranceui.AppConfig.entityManager(AppConfig.java:29) ~[main/:na]
        at com.midamcorp.insuranceui.AppConfig$$EnhancerBySpringCGLIB$$1d809dad.CGLIB$entityManager$7(<generated>) ~[main/:na]
        at com.midamcorp.insuranceui.AppConfig$$EnhancerBySpringCGLIB$$1d809dad$$FastClassBySpringCGLIB$$6a4ae74c.invoke(<generated>) ~[main/:na]
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        at com.midamcorp.insuranceui.AppConfig$$EnhancerBySpringCGLIB$$1d809dad.entityManager(<generated>) ~[main/:na]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
        at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.4.RELEASE.jar:5.1.4.RELEASE]
        ... 18 common frames omitted
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-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:54) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:137) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:94) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
        ... 65 common frames omitted

Answer 1

我相信你的方言屬性設置錯誤

spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect

應該

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

Answer 2

當我得到

未設置“hibernate.dialect”時，對 DialectResolutionInfo 的訪問不能為空

在此錯誤之上，還有其他錯誤，有一次我得到：

sql.SQLSyntaxErrorException：拒絕用戶“tenant2”@“localhost”對數據庫“tenant2”的訪問。

另一次是關於“serverTimeZone”。 所以我的答案是查看上面的錯誤，這是您的根本原因。

Answer 3

就我而言，任何阻止 Spring JPA 連接到數據庫的錯誤都會導致此錯誤，但沒有具體信息。 錯誤配置的例子是：

• 錯誤的數據庫 URL
• 錯誤的用戶/密碼

更難發現的情況是

我的 SQL 服務器沒有為特定時區配置，所以添加&serverTimezone=xxx （正如@Janet 已經指出的那樣）

到數據庫網址解決了這個問題。 例如

jdbc:mysql://127.0.0.1:3306/dbname?autoReconnect=true&serverTimezone=UTC

此外，我在一個特定環境中遇到了 SSL 憑據問題，添加&useSSL=false解決了該問題。 現在我的連接 URL 看起來像

jdbc:mysql://127.0.0.1:3306/dbname?autoReconnect=true&serverTimezone=UTC&useSSL=false

Answer 4

屬性的名稱很好，是您定義的類導致了問題。 不推薦使用PostgreSQLDialect方言。 改成例如：

spring.jpa.database-platform = org.hibernate.dialect.PostgreSQL95Dialect

這是用於 postgres 9.5。 更多信息在這里。 如果您有其他版本的 postgres，您可以找到正確版本的方言類。

Answer 5

對我來說，我需要一個配置類

@Configuration
public class HikariConfig {
    @Autowired
    Environment environment;


@Bean(name = "dataSource")
public DataSource dataSource() {
    HikariDataSource dataSource = new HikariDataSource();
    dataSource.setJdbcUrl(environment.getProperty("spring.datasource.url"));
    dataSource.setUsername(environment.getProperty("spring.datasource.hikari.username"));
    dataSource.setPassword(environment.getProperty("spring.datasource.hikari.password"));
    dataSource.setCatalog("*****");
    /**
     * HikariCP specific properties. Remove if you move to other connection pooling library.
     **/
    dataSource.addDataSourceProperty("cachePrepStmts", true);
    dataSource.addDataSourceProperty("prepStmtCacheSize", 25000);
    dataSource.addDataSourceProperty("prepStmtCacheSqlLimit", 20048);
    dataSource.addDataSourceProperty("useServerPrepStmts", true);
    dataSource.addDataSourceProperty("initializationFailFast", true);

    dataSource.setPoolName(environment.getProperty("microdb.datasource.hikari.poolName"));
    dataSource.setMaximumPoolSize(Integer.parseInt(environment.getProperty("spring.datasource.hikari.maximumPoolSize")));
    dataSource.setMinimumIdle(Integer.parseInt(environment.getProperty("spring.datasource.hikari.minimumIdle")));
    dataSource.setIdleTimeout(Long.parseLong(environment.getProperty("spring.datasource.hikari.idleTimeout")));
    dataSource.setMaxLifetime(Long.parseLong(environment.getProperty("spring.datasource.hikari.maxLifetime")));
    dataSource.setConnectionTimeout(Long.parseLong(environment.getProperty("spring.datasource.hikari.connectionTimeout")));

    return dataSource;
}}

在 application.properties 文件中我設置：

spring.datasource.url=jdbc:oracle:thin:@xxxxxxx:xxx:xxxx
spring.datasource.hikari.username=xxxxx
spring.datasource.hikari.password=xxxxx
spring.datasource.hikari.minimumIdle=5
spring.datasource.hikari.maximumPoolSize=20
spring.datasource.hikari.idleTimeout=30000
spring.datasource.hikari.poolName=HikariCP
spring.datasource.hikari.maxLifetime=2000000
spring.datasource.hikari.connectionTimeout=30000