"AnnotationException: mappedBy reference an unknown target entity property" in Hibernate

Issue

• The exception below is raised while deploying a persistence unit:

  ... org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: org.mypackage.ManySide.oneside in org.mypackage.OneSide.manySides
          at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:708)
          at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:668)
          at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:66)
          at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1605)
          at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1363)
          at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1749)
          at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:94)
          at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:920)
          ...
  

• The entity classes have been defined as follows

  @Entity
  public class OneSide {
      ...
      @OneToMany(mappedBy = "oneside" ...)
      private List<ManySide> manySides;
      ...
  }
  
  @Entity
  @Inheritance(strategy = InheritanceType.SINGLE_TABLE)
  @DiscriminatorColumn(...)
  public abstract class Parent {
      ...
      @ManyToOne
      @JoinColumn(name = "COMMENT_ID")
      protected OneSide oneside;
      ...
  }
  
  @Entity
  public class ManySide extends Parent implements Serializable {
      ...
  }