title: AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class
body: <p>My User super class:</p>
  
  <pre><code>@MappedSuperclass
  public class User implements Serializable {
  
      @ManyToOne(targetEntity = Role.class, fetch = FetchType.EAGER)
      @JoinColumn(name = "roleId", referencedColumnName = "id")
      private Role role;
  
      other attributes ...
  </code></pre>
  
  <p>Here my role entity: </p>
  
  <pre><code>@Entity
  public class Role implements GrantedAuthority {
  
      @JsonIgnore
      @OneToMany(mappedBy = "role", targetEntity = User.class, fetch = FetchType.LAZY)
      private Set&lt;User&gt; users = new HashSet&lt;&gt;();
  
      another attributes ...
  </code></pre>
  
  <p>i have this subclass of the user class:</p>
  
  <pre><code>@Entity
  @Table
  @Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
  public class AUser extends User {
  ...
  }
  </code></pre>
  
  <p>another subclass: </p>
  
  <pre><code>@Entity
  @Table
  @Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
  public class BUser extends User {
       ....
  }
  </code></pre>
  
  <p>Here is my exception:</p>
  
  <pre><code>org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.x.y.model.Role.users[com.x.y.model.User]
          at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1081) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:856) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
          at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
          at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
          at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
          at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:134) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE]
          at com.x.y.XApplication.main(XApplication.java:15) [classes/:na]
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_60]
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_60]
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_60]
          at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_60]
          at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.4.2.RELEASE.jar:1.4.2.RELEASE]
  Caused by: org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.x.y.model.Role.users[com.x.y.model.User]
          at org.hibernate.cfg.annotations.CollectionBinder.bindManyToManySecondPass(CollectionBinder.java:1191) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:794) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:719) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:54) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1655) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.processSecondPasses(InFlightMetadataCollectorImpl.java:1623) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:278) ~[hibernate-core-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:847) ~[hibernate-entitymanager-5.0.11.Final.jar:5.0.11.Final]
          at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:874) ~[hibernate-entitymanager-5.0.11.Final.jar:5.0.11.Final]
          at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:353) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:373) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:362) ~[spring-orm-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1642) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1579) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
          ... 20 common frames omitted
  </code></pre>
  
  <p>Can someone tells me what is wrong in my code?</p>