After Spring Boot 2 0 migration jdbcUrl is required with driverClassName

Question

SOLVED  My solution  I delete dataSource   method from DatabaseConfig java  Then  the application was started successfully     I ve just updated my Spring Boot project from 1 5 x to 2 0 0  Before the update  this application works properly but after the update  I m getting some errors are below  What is the problem  can you help me   I use PostgreSQL  Hibernate  JPA in the project   I ve tried also this but it doesn t work for me   Thanks for your time     Here is problems   2018-03-03 23 19 37 934 ERROR 42323 ---             main  com zaxxer hikari HikariConfig             HikariPool-1 - dataSource or dataSourceClassName or jdbcUrl is required  2018-03-03 23 19 37 938  WARN 42323 ---             main  ConfigServletWebServerApplicationContext   Exception encountered during context initialization - cancelling refresh attempt  org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  entityManagerFactory  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Unsatisfied dependency expressed through method  entityManagerFactory  parameter 0  nested exception is org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  entityManagerFactoryBuilder  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Unsatisfied dependency expressed through method  entityManagerFactoryBuilder  parameter 0  nested exception is org springframework beans factory BeanCreationException  Error creating bean with name  jpaVendorAdapter  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Bean instantiation via factory method failed  nested exception is org springframework beans BeanInstantiationException  Failed to instantiate  org springframework orm jpa JpaVendorAdapter   Factory method  jpaVendorAdapter  threw exception  nested exception is java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required  2018-03-03 23 19 37 939  INFO 42323 ---             main  o apache catalina core StandardService     Stopping service  Tomcat  2018-03-03 23 19 37 954  INFO 42323 ---             main  ConditionEvaluationReportLoggingListener     Error starting ApplicationContext  To display the conditions report re-run your application with  debug  enabled  2018-03-03 23 19 37 963 ERROR 42323 ---             main  o s boot SpringApplication                 Application run failed  org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  entityManagerFactory  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Unsatisfied dependency expressed through method  entityManagerFactory  parameter 0  nested exception is org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  entityManagerFactoryBuilder  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Unsatisfied dependency expressed through method  entityManagerFactoryBuilder  parameter 0  nested exception is org springframework beans factory BeanCreationException  Error creating bean with name  jpaVendorAdapter  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Bean instantiation via factory method failed  nested exception is org springframework beans BeanInstantiationException  Failed to instantiate  org springframework orm jpa JpaVendorAdapter   Factory method  jpaVendorAdapter  threw exception  nested exception is java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required      at org springframework beans factory support ConstructorResolver createArgumentArray ConstructorResolver java 729    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver instantiateUsingFactoryMethod ConstructorResolver java 470    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory instantiateUsingFactoryMethod AbstractAutowireCapableBeanFactory java 1250    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBeanInstance AbstractAutowireCapableBeanFactory java 1099    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory doCreateBean AbstractAutowireCapableBeanFactory java 545    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBean AbstractAutowireCapableBeanFactory java 502    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory lambda doGetBean 0 AbstractBeanFactory java 312    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultSingletonBeanRegistry getSingleton DefaultSingletonBeanRegistry java 228    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory doGetBean AbstractBeanFactory java 310    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory getBean AbstractBeanFactory java 200    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework context support AbstractApplicationContext getBean AbstractApplicationContext java 1085    spring-context-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework context support AbstractApplicationContext finishBeanFactoryInitialization AbstractApplicationContext java 858    spring-context-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework context support AbstractApplicationContext refresh AbstractApplicationContext java 549    spring-context-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework boot web servlet context ServletWebServerApplicationContext refresh ServletWebServerApplicationContext java 140    spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot SpringApplication refresh SpringApplication java 752   spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot SpringApplication refreshContext SpringApplication java 388   spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot SpringApplication run SpringApplication java 327   spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot SpringApplication run SpringApplication java 1246   spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot SpringApplication run SpringApplication java 1234   spring-boot-2 0 0 RELEASE jar 2 0 0 RELEASE      at com Test Test TestApplication main TestApplication java 17   classes  na  Caused by  org springframework beans factory UnsatisfiedDependencyException  Error creating bean with name  entityManagerFactoryBuilder  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Unsatisfied dependency expressed through method  entityManagerFactoryBuilder  parameter 0  nested exception is org springframework beans factory BeanCreationException  Error creating bean with name  jpaVendorAdapter  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Bean instantiation via factory method failed  nested exception is org springframework beans BeanInstantiationException  Failed to instantiate  org springframework orm jpa JpaVendorAdapter   Factory method  jpaVendorAdapter  threw exception  nested exception is java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required      at org springframework beans factory support ConstructorResolver createArgumentArray ConstructorResolver java 729    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver instantiateUsingFactoryMethod ConstructorResolver java 470    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory instantiateUsingFactoryMethod AbstractAutowireCapableBeanFactory java 1250    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBeanInstance AbstractAutowireCapableBeanFactory java 1099    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory doCreateBean AbstractAutowireCapableBeanFactory java 545    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBean AbstractAutowireCapableBeanFactory java 502    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory lambda doGetBean 0 AbstractBeanFactory java 312    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultSingletonBeanRegistry getSingleton DefaultSingletonBeanRegistry java 228    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory doGetBean AbstractBeanFactory java 310    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory getBean AbstractBeanFactory java 200    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory config DependencyDescriptor resolveCandidate DependencyDescriptor java 251    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultListableBeanFactory doResolveDependency DefaultListableBeanFactory java 1138    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultListableBeanFactory resolveDependency DefaultListableBeanFactory java 1065    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver resolveAutowiredArgument ConstructorResolver java 815    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver createArgumentArray ConstructorResolver java 721    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE          19 common frames omitted Caused by  org springframework beans factory BeanCreationException  Error creating bean with name  jpaVendorAdapter  defined in class path resource  org springframework boot autoconfigure orm jpa HibernateJpaConfiguration class   Bean instantiation via factory method failed  nested exception is org springframework beans BeanInstantiationException  Failed to instantiate  org springframework orm jpa JpaVendorAdapter   Factory method  jpaVendorAdapter  threw exception  nested exception is java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required      at org springframework beans factory support ConstructorResolver instantiateUsingFactoryMethod ConstructorResolver java 587    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory instantiateUsingFactoryMethod AbstractAutowireCapableBeanFactory java 1250    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBeanInstance AbstractAutowireCapableBeanFactory java 1099    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory doCreateBean AbstractAutowireCapableBeanFactory java 545    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractAutowireCapableBeanFactory createBean AbstractAutowireCapableBeanFactory java 502    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory lambda doGetBean 0 AbstractBeanFactory java 312    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultSingletonBeanRegistry getSingleton DefaultSingletonBeanRegistry java 228    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory doGetBean AbstractBeanFactory java 310    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support AbstractBeanFactory getBean AbstractBeanFactory java 200    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory config DependencyDescriptor resolveCandidate DependencyDescriptor java 251    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultListableBeanFactory doResolveDependency DefaultListableBeanFactory java 1138    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support DefaultListableBeanFactory resolveDependency DefaultListableBeanFactory java 1065    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver resolveAutowiredArgument ConstructorResolver java 815    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver createArgumentArray ConstructorResolver java 721    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE          33 common frames omitted Caused by  org springframework beans BeanInstantiationException  Failed to instantiate  org springframework orm jpa JpaVendorAdapter   Factory method  jpaVendorAdapter  threw exception  nested exception is java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required      at org springframework beans factory support SimpleInstantiationStrategy instantiate SimpleInstantiationStrategy java 185    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework beans factory support ConstructorResolver instantiateUsingFactoryMethod ConstructorResolver java 579    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE          46 common frames omitted Caused by  java lang IllegalArgumentException  dataSource or dataSourceClassName or jdbcUrl is required      at com zaxxer hikari HikariConfig validate HikariConfig java 1063    HikariCP-2 7 8 jar na      at com zaxxer hikari HikariDataSource getConnection HikariDataSource java 109    HikariCP-2 7 8 jar na      at org springframework jdbc datasource DataSourceUtils fetchConnection DataSourceUtils java 151    spring-jdbc-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework jdbc datasource DataSourceUtils doGetConnection DataSourceUtils java 115    spring-jdbc-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework jdbc datasource DataSourceUtils getConnection DataSourceUtils java 78    spring-jdbc-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework jdbc support JdbcUtils extractDatabaseMetaData JdbcUtils java 318    spring-jdbc-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework jdbc support JdbcUtils extractDatabaseMetaData JdbcUtils java 355    spring-jdbc-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework boot autoconfigure orm jpa DatabaseLookup getDatabase DatabaseLookup java 72    spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot autoconfigure orm jpa JpaProperties determineDatabase JpaProperties java 168    spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot autoconfigure orm jpa JpaBaseConfiguration jpaVendorAdapter JpaBaseConfiguration java 111    spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot autoconfigure orm jpa HibernateJpaConfiguration  EnhancerBySpringCGLIB  738c1df5 CGLIB jpaVendorAdapter 3  lt generated gt     spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework boot autoconfigure orm jpa HibernateJpaConfiguration  EnhancerBySpringCGLIB  738c1df5  FastClassBySpringCGLIB  beb7cb58 invoke  lt generated gt     spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      at org springframework cglib proxy MethodProxy invokeSuper MethodProxy java 228    spring-core-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework context annotation ConfigurationClassEnhancer BeanMethodInterceptor intercept ConfigurationClassEnhancer java 361    spring-context-5 0 4 RELEASE jar 5 0 4 RELEASE      at org springframework boot autoconfigure orm jpa HibernateJpaConfiguration  EnhancerBySpringCGLIB  738c1df5 jpaVendorAdapter  lt generated gt     spring-boot-autoconfigure-2 0 0 RELEASE jar 2 0 0 RELEASE      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 564    na na      at org springframework beans factory support SimpleInstantiationStrategy instantiate SimpleInstantiationStrategy java 154    spring-beans-5 0 4 RELEASE jar 5 0 4 RELEASE          47 common frames omitted   Process finished with exit code 1   Here is my pom xml    lt parent gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-starter-parent lt  artifactId gt       lt version gt 2 0 0 RELEASE lt  version gt   lt  parent gt    lt properties gt        lt project build sourceEncoding gt UTF-8 lt  project build sourceEncoding gt         lt project reporting outputEncoding gt UTF-8 lt  project reporting outputEncoding gt          lt java version gt 1 9 lt  java version gt   lt  properties gt    lt dependencies gt       lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-properties-migrator lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-data-jpa lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt org postgresql lt  groupId gt               lt artifactId gt postgresql lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-test lt  artifactId gt               lt scope gt test lt  scope gt       lt  dependency gt       lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-web lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt io springfox lt  groupId gt               lt artifactId gt springfox-swagger2 lt  artifactId gt               lt version gt 2 7 0 lt  version gt       lt  dependency gt       lt dependency gt               lt groupId gt io springfox lt  groupId gt               lt artifactId gt springfox-swagger-ui lt  artifactId gt               lt version gt 2 7 0 lt  version gt       lt  dependency gt       lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-security lt  artifactId gt       lt  dependency gt       lt dependency gt           lt groupId gt org hibernate lt  groupId gt           lt artifactId gt hibernate-core lt  artifactId gt       lt  dependency gt       lt dependency gt           lt groupId gt org hibernate lt  groupId gt           lt artifactId gt hibernate-entitymanager lt  artifactId gt       lt  dependency gt       lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-starter-mail lt  artifactId gt               lt version gt 1 4 3 RELEASE lt  version gt       lt  dependency gt   lt  dependencies gt    Here is my application yml   spring    application      name  Test    jpa      hibernate        ddl-auto  update       use-new-id-generator-mappings  true     generate-ddl  true     properties        dialect  org hibernate dialect PostgreSQLDialect    session      store-type  none    datasource      driverClassName  org postgresql Driver     url  jdbc postgresql   localhost 5432 test     username  test     password  1234      tomcat        max-idle  2       max-active  3     type  com zaxxer hikari HikariDataSource   UPDATE   My DatabaseConfig java    Configuration public class DatabaseConfig        Bean      Primary      ConfigurationProperties prefix    spring datasource       public DataSource dataSource     return DataSourceBuilder create   build            Bean     public SimpleMailMessage templateSimpleMessage             SimpleMailMessage message   new SimpleMailMessage            message setText                   This is the test email template for your email  n s n            return message

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I have added in Application Class   Bean  ConfigurationProperties  app datasource   public DataSource dataSource         return DataSourceBuilder create   build        application properties I have added   app datasource url jdbc mysql   localhost test app datasource username dbuser app datasource password dbpass app datasource pool-size 30   More details Configure a Custom DataSource

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In case you do need to define dataSource    for example when you have multiple data sources  you can use   Autowired Environment env    Primary  Bean public DataSource customDataSource          DriverManagerDataSource dataSource   new DriverManagerDataSource        dataSource setDriverClassName env getProperty  quot custom datasource driver-class-name quot         dataSource setUrl env getProperty  quot custom datasource url quot         dataSource setUsername env getProperty  quot custom datasource username quot         dataSource setPassword env getProperty  quot custom datasource password quot          return dataSource      By setting up the dataSource yourself  instead of using DataSourceBuilder   it fixed my problem which you also had  The always knowledgeable Baeldung has a tutorial which explains in depth

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Your can use DataSourceBuilder for this purpose   Primary  Bean name    quot dataSource quot    ConfigurationProperties prefix    quot spring datasource quot   public DataSource dataSource Environment env        final String datasourceUsername   env getRequiredProperty  quot spring datasource username quot        final String datasourcePassword   env getRequiredProperty  quot spring datasource password quot        final String datasourceUrl   env getRequiredProperty  quot spring datasource url quot        final String datasourceDriver   env getRequiredProperty  quot spring datasource driver-class-name quot        return DataSourceBuilder              create                username datasourceUsername               password datasourcePassword               url datasourceUrl               driverClassName datasourceDriver               build

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This worked for me   application properties  used jdbc-url instead of url   datasource apidb jdbc-url jdbc mysql   localhost 3306 apidb useSSL false datasource apidb username root datasource apidb password 123 datasource apidb driver-class-name com mysql jdbc Driver   Configuration class    Configuration  EnableJpaRepositories          entityManagerFactoryRef    fooEntityManagerFactory           basePackages     com buddhi multidatasource foo repository     public class FooDataSourceConfig         Bean name    fooDataSource        ConfigurationProperties prefix    datasource foo       public HikariDataSource dataSource             return DataSourceBuilder create   type HikariDataSource class  build                Bean name    fooEntityManagerFactory       public LocalContainerEntityManagerFactoryBean fooEntityManagerFactory              EntityManagerFactoryBuilder builder               Qualifier  fooDataSource   DataSource dataSource                 return builder                  dataSource dataSource                   packages  com buddhi multidatasource foo model                    persistenceUnit  fooDb                    build

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As this post gets a bit of popularity I edited it a bit  Spring Boot 2 x x changed default JDBC connection pool from Tomcat to faster and better HikariCP  Here comes incompatibility  because HikariCP uses different property of jdbc url  There are two ways how to handle it   OPTION ONE  There is very good explanation and workaround in spring docs   Also  if you happen to have Hikari on the classpath  this basic setup does not work  because Hikari has no url property  but does have a jdbcUrl property   In that case  you must rewrite your configuration as follows   app datasource jdbc-url jdbc mysql   localhost test app datasource username dbuser app datasource password dbpass   OPTION TWO  There is also how-to in the docs how to get it working from  both worlds   It would look like below  ConfigurationProperties bean would do  conversion  for jdbcUrl from app datasource url   Configuration public class DatabaseConfig        Bean      ConfigurationProperties  app datasource       public DataSourceProperties dataSourceProperties             return new DataSourceProperties                Bean      ConfigurationProperties  app datasource       public HikariDataSource dataSource DataSourceProperties properties            return properties initializeDataSourceBuilder   type HikariDataSource class                   build

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This happened to me because I was using   app datasource url jdbc mysql   localhost test   When I replaced url by jdbc-url then it worked   app datasource jdbc-url jdbc mysql   localhost test

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I also read the Spring docs  as lapkritinis suggested - and luckily this brought me on the right path  But I don  t think  that the Spring docs explain this good right now  At least for me  they aren  t consistent IMHO   The original problem question is on what to do  if you upgrade an existing Spring Boot 1 5 x application to 2 0 x  which is using PostgreSQL Hibernate  The main reason  you get your described error  is that Spring Boot 2 0 x uses HikariCP instead of Tomcat JDBC pooling DataSource as a default - and Hikari  s DataSource doesn  t know the spring datasource url property  instead it want  s to have spring datasource jdbc-url  lapkritinis also pointed that out    So far so good  BUT the docs also suggest - and that  s the problem here - that Spring Boot uses spring datasource url to determine  if the - often locally used - embedded Database like H2 has to back off and instead use a production Database      You should at least specify the URL by setting the   spring datasource url property  Otherwise  Spring Boot tries to   auto-configure an embedded database    You may see the dilemma  If you want to have your embedded DataBase like you  re used to  you have to switch back to Tomcat JDBC  This is also much more minimally invasive to existing applications  as you don  t have to change source code  To get your existing application working after the Spring Boot 1 5 x --  2 0 x upgrade with PostgreSQL  just add tomcat-jdbc as a dependency to your pom xml        lt dependency gt           lt groupId gt org apache tomcat lt  groupId gt           lt artifactId gt tomcat-jdbc lt  artifactId gt       lt  dependency gt    And then configure Spring Boot to use it accordingly inside application properties   spring datasource type org apache tomcat jdbc pool DataSource   Hope to help some folks with this  was quite a time consuming problem  I also hope my beloved Spring folks update the docs - and the way new Hikari pool is configured - to get a more consistent Spring Boot user experience

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Others have answered so I ll add my 2-cents   You can either use autoconfiguration  i e  don t use a  Configuration to create a datasource  or java configuration   Auto-configuration   define your datasource type then set the type properties  E g   spring datasource type com zaxxer hikari HikariDataSource spring datasource hikari driver-class-name org h2 Driver spring datasource hikari jdbc-url jdbc h2 mem testdb spring datasource hikari username sa spring datasource hikari password password spring datasource hikari max-wait 10000 spring datasource hikari connection-timeout 30000 spring datasource hikari idle-timeout 600000 spring datasource hikari max-lifetime 1800000 spring datasource hikari leak-detection-threshold 600000 spring datasource hikari maximum-pool-size 100 spring datasource hikari pool-name MyDataSourcePoolName   Java configuration   Choose a prefix and define your data source   spring mysystem datasource type com zaxxer hikari HikariDataSource spring mysystem datasource jdbc-  url jdbc sqlserver   databaseserver com 18889 Database MyDatabase  spring mysystem datasource username dsUsername spring mysystem datasource password dsPassword spring mysystem datasource driver-class-name com microsoft sqlserver jdbc SQLServerDriver spring mysystem datasource max-wait 10000 spring mysystem datasource connection-timeout 30000 spring mysystem datasource idle-timeout 600000 spring mysystem datasource max-lifetime 1800000 spring mysystem datasource leak-detection-threshold 600000 spring mysystem datasource maximum-pool-size 100 spring mysystem datasource pool-name MySystemDatasourcePool   Create your datasource bean    Bean name      dataSource    mysystemDataSource      ConfigurationProperties prefix    spring mysystem datasource   public DataSource dataSource         return DataSourceBuilder create   build        You can leave the datasource type out  but then you risk spring guessing what datasource type to use

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Configure Two DataSources in Spring Boot 2 0   or above  If you need to configure multiple data sources  you have to mark one of the DataSource instances as  Primary  because various auto-configurations down the road expect to be able to get one by type   If you create your own DataSource  the auto-configuration backs off  In the following example  we provide the exact same feature set as the auto-configuration provides on the primary data source      Bean  Primary  ConfigurationProperties  app datasource first   public DataSourceProperties firstDataSourceProperties         return new DataSourceProperties        Bean  Primary  ConfigurationProperties  app datasource first   public DataSource firstDataSource         return firstDataSourceProperties   initializeDataSourceBuilder   build        Bean  ConfigurationProperties  app datasource second   public BasicDataSource secondDataSource         return DataSourceBuilder create   type BasicDataSource class  build           firstDataSourceProperties has to be flagged as  Primary so that the database initializer feature uses your copy  if you use the initializer     And your application propoerties will look something like this   app datasource first url jdbc oracle thin  localhost first app datasource first username dbuser app datasource first password dbpass app datasource first driver-class-name oracle jdbc OracleDriver  app datasource second url jdbc mariadb   localhost 3306 springboot mariadb app datasource second username dbuser app datasource second password dbpass app datasource second driver-class-name org mariadb jdbc Driver   The above method is the correct to way to init multiple database in spring boot 2 0 migration and above  More read can be found here

[java] After Spring Boot 2.0 migration: jdbcUrl is required with driverClassName

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