@Entity
@Table(name = "ZipAreas")
public class ZipArea implements Serializable
{
   @EmbeddedId
   private ZipAreaId id;

   @ManyToOne
   @PrimaryKeyJoinColumns(value = {@PrimaryKeyJoinColumn(name = "country_code", referencedColumnName = "country_code"), @PrimaryKeyJoinColumn(name = "zip_code", referencedColumnName = "code")})
   private Zip zip = null;

   @ManyToOne
   @PrimaryKeyJoinColumns(value = {@PrimaryKeyJoinColumn(name = "country_code", referencedColumnName = "country_code"), @PrimaryKeyJoinColumn(name = "state_code", referencedColumnName = "state_code"), @PrimaryKeyJoinColumn(name = "city_name", referencedColumnName = "name")})
   private City city = null;

   @OneToMany(targetEntity = PostAddress.class, mappedBy = "postAddresses")
   private Set<PostAddress> postAddresses = new HashSet<PostAddress>();

        ...

org.hibernate.MappingException: Unable to find column with logical name: state_code in ZipAreas
   org.hibernate.cfg.Ejb3JoinColumn.checkReferencedColumnsType(Ejb3JoinColumn.java:419)
   org.hibernate.cfg.BinderHelper.createSyntheticPropertyReference(BinderHelper.java:102)
   org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:88)
   org.hibernate.cfg.AnnotationConfiguration.processEndOfQueue(AnnotationConfiguration.java:456)
   org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:438)
   org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:309)
   org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1148)
   org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1226)
   org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:173)
   org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:854)
   org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:191)
   org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:253)
   org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125)
   javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
   javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
   com.kawoolutions.bbstats.servlet.BasketballStatsServlet.doGet(BasketballStatsServlet.java:67)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:803)