title: Intellij - Spring boot - maven
body: <p>I get the following errors and don't know how to solve:</p>
  <pre><code> :: Spring Boot ::        (v2.1.6.RELEASE)
  
  2021-09-19 20:43:13.518  INFO 3932 --- [           main] z.a.n.ac.web.sb.RestServiceApplication   : Starting RestServiceApplication on P11946237-1 with PID 3932 (C:\DO\nwu\AccountSystem\AccountSystemWebSpringBoot\target\classes started by 11946237 in C:\DO\nwu\AccountSystem)
  2021-09-19 20:43:13.521  INFO 3932 --- [           main] z.a.n.ac.web.sb.RestServiceApplication   : No active profile set, falling back to default profiles: default
  2021-09-19 20:43:14.377  INFO 3932 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
  2021-09-19 20:43:14.443  INFO 3932 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 56ms. Found 1 repository interfaces.
  2021-09-19 20:43:14.988  INFO 3932 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$c39ad763] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
  2021-09-19 20:43:15.366  INFO 3932 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8090 (http)
  2021-09-19 20:43:15.396  INFO 3932 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
  2021-09-19 20:43:15.396  INFO 3932 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.21]
  2021-09-19 20:43:15.554  INFO 3932 --- [           main] o.a.c.c.C.[.[.[/account-system]          : Initializing Spring embedded WebApplicationContext
  2021-09-19 20:43:15.554  INFO 3932 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1985 ms
  2021-09-19 20:43:15.824  INFO 3932 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
  2021-09-19 20:43:16.409  INFO 3932 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
  2021-09-19 20:43:16.466  INFO 3932 --- [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
      name: default
      ...]
  2021-09-19 20:43:16.559  INFO 3932 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.3.10.Final}
  2021-09-19 20:43:16.566  INFO 3932 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
  2021-09-19 20:43:16.783  INFO 3932 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
  2021-09-19 20:43:16.963  INFO 3932 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.Oracle10gDialect
  2021-09-19 20:43:17.335  WARN 3932 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: account, for columns: [org.hibernate.mapping.Column(account_transactions)]
  2021-09-19 20:43:17.335  INFO 3932 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
  2021-09-19 20:43:17.341  INFO 3932 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
  2021-09-19 20:43:17.344  INFO 3932 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
  2021-09-19 20:43:17.358  INFO 3932 --- [           main] ConditionEvaluationReportLoggingListener : 
  
  
  Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
  2021-09-19 20:43:17.371 ERROR 3932 --- [           main] o.s.boot.SpringApplication               : Application run failed
  
  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: account, for columns: [org.hibernate.mapping.Column(account_transactions)]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1105) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:742) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:389) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:1213) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:1202) [spring-boot-2.1.6.RELEASE.jar:2.1.6.RELEASE]
      at za.ac.nwu.ac.web.sb.RestServiceApplication.main(RestServiceApplication.java:9) [classes/:na]
  
  
  Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: account, for columns: [org.hibernate.mapping.Column(account_transactions)]
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:402) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:377) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1837) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1774) ~[spring-beans-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      ... 16 common frames omitted
  
  
  Caused by: org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: account, for columns: [org.hibernate.mapping.Column(account_transactions)]
      at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:486) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:453) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.mapping.Property.isValid(Property.java:226) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:624) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.mapping.RootClass.validate(RootClass.java:267) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:347) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:466) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:939) ~[hibernate-core-5.3.10.Final.jar:5.3.10.Final]
      at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:57) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:390) ~[spring-orm-5.1.8.RELEASE.jar:5.1.8.RELEASE]
      ... 20 common frames omitted
  </code></pre>