Program: 66543
Project: 66543
Buggy source:
/** 
 * INTERNAL: Register a ReferenceResolver as an event listener on the session,  if one doesn't already exist.  Each source/target field will have a namespace resolver set as well. 
 * @see org.eclipse.persistence.internal.oxm.ReferenceResolver
 * @see org.eclipse.persistence.oxm.NamespaceResolver
 */
public void initialize(AbstractSession session) throws DescriptorException {
  if (getReferenceClass() == null) {
    setReferenceClass(session.getDatasourcePlatform().getConversionManager().convertClassNameToClass(getReferenceClassName()));
  }
  super.initialize(session);
  ReferenceListener listener=new ReferenceListener();
  if (!(session.getEventManager().getListeners().contains(listener))) {
    session.getEventManager().addListener(listener);
  }
  XMLDescriptor descriptor=(XMLDescriptor)this.getDescriptor();
  XMLDescriptor targetDescriptor=(XMLDescriptor)getReferenceDescriptor();
  for (int index=0; index < sourceToTargetKeys.size(); index++) {
    XMLField sourceField=(XMLField)sourceToTargetKeys.get(index);
    XMLField targetField=(XMLField)sourceToTargetKeyFieldAssociations.remove(sourceField);
    sourceField=(XMLField)descriptor.buildField(sourceField);
    sourceToTargetKeys.set(index,sourceField);
    targetField=(XMLField)targetDescriptor.buildField(targetField);
    sourceToTargetKeyFieldAssociations.put(sourceField,targetField);
  }
  if (this.inverseReferenceMapping != null) {
    if (null != this.inverseReferenceMapping.getAttributeAccessor()) {
      this.inverseReferenceMapping.getAttributeAccessor().initializeAttributes(this.referenceClass);
    }
  }
}

Fixed version (ground truth):
/** 
 * INTERNAL: Register a ReferenceResolver as an event listener on the session,  if one doesn't already exist.  Each source/target field will have a namespace resolver set as well. 
 * @see org.eclipse.persistence.internal.oxm.ReferenceResolver
 * @see org.eclipse.persistence.oxm.NamespaceResolver
 */
public void initialize(AbstractSession session) throws DescriptorException {
  if (getReferenceClass() == null) {
    if (getReferenceClassName() == null) {
      throw DescriptorException.referenceClassNotSpecified(this);
    }
    setReferenceClass(session.getDatasourcePlatform().getConversionManager().convertClassNameToClass(getReferenceClassName()));
  }
  super.initialize(session);
  ReferenceListener listener=new ReferenceListener();
  if (!(session.getEventManager().getListeners().contains(listener))) {
    session.getEventManager().addListener(listener);
  }
  XMLDescriptor descriptor=(XMLDescriptor)this.getDescriptor();
  XMLDescriptor targetDescriptor=(XMLDescriptor)getReferenceDescriptor();
  for (int index=0; index < sourceToTargetKeys.size(); index++) {
    XMLField sourceField=(XMLField)sourceToTargetKeys.get(index);
    XMLField targetField=(XMLField)sourceToTargetKeyFieldAssociations.remove(sourceField);
    sourceField=(XMLField)descriptor.buildField(sourceField);
    sourceToTargetKeys.set(index,sourceField);
    targetField=(XMLField)targetDescriptor.buildField(targetField);
    sourceToTargetKeyFieldAssociations.put(sourceField,targetField);
  }
  if (this.inverseReferenceMapping != null) {
    if (null != this.inverseReferenceMapping.getAttributeAccessor()) {
      this.inverseReferenceMapping.getAttributeAccessor().initializeAttributes(this.referenceClass);
    }
  }
}