javax.persistence.PersistenceException: [PersistenceUnit: buzzPU] Unable to build Hibernate SessionFactory
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.persistenceException(EntityManagerFactoryBuilderImpl.java:1225)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.access$600(EntityManagerFactoryBuilderImpl.java:119)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:853)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)
	at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)
	at org.hibernate.jpa.HibernatePersistenceProvider.createContainerEntityManagerFactory(HibernatePersistenceProvider.java:152)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:336)
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:318)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
	... 40 more
Caused by: org.hibernate.AnnotationException: Property of @IdClass not found in entity org.soluvas.buzz.core.jpa.TwitterListedCount: fetchTime
	at org.hibernate.cfg.AnnotationBinder.fillComponent(AnnotationBinder.java:2603)
	at org.hibernate.cfg.AnnotationBinder.bindIdClass(AnnotationBinder.java:2716)
	at org.hibernate.cfg.AnnotationBinder.mapAsIdClass(AnnotationBinder.java:1041)
	at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:781)
	at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3788)
	at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3742)
	at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1410)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1844)
	at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
	... 48 more

@MappedSuperclass()
public abstract class TwitterCount {

	@Id
	@Basic()
	private long twitterUserId = 0;
	@Id
	@Basic()
	@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentDateTime")
	private DateTime fetchTime = null;

	public long getTwitterUserId() {
		return twitterUserId;
	}

	public void setTwitterUserId(long newTwitterUserId) {
		twitterUserId = newTwitterUserId;
	}

	public DateTime getFetchTime() {
		return fetchTime;
	}

	public void setFetchTime(DateTime newFetchTime) {
		fetchTime = newFetchTime;
	}

}

@Entity()
@IdClass(TwitterCountKey.class)
public class TwitterListedCount extends TwitterCount {

	@Basic(optional = false)
	private int listedCount = 0;

	public int getListedCount() {
		return listedCount;
	}

	public void setListedCount(int newListedCount) {
		listedCount = newListedCount;
	}

}

public class TwitterCountKey implements Serializable {

	private static final long serialVersionUID = 1L;
	
	private long twitterUserId = 0;
	private DateTime fetchTime = null;
	
	public TwitterCountKey(long twitterUserId, DateTime fetchTime) {
		super();
		this.twitterUserId = twitterUserId;
		this.fetchTime = fetchTime;
	}

	public long getTwitterUserId() {
		return twitterUserId;
	}

	public void setTwitterUserId(long newTwitterUserId) {
		twitterUserId = newTwitterUserId;
	}

	public DateTime getFetchTime() {
		return fetchTime;
	}

	public void setFetchTime(DateTime newFetchTime) {
		fetchTime = newFetchTime;
	}

}