JAXBEncoderDecoder doesn't respect @XmlType's propOrder in Exception class

Property order is ignored when marshal this exception class by JAXBEncoderDecoder:

@XmlRootElement(name = "fault")
@XmlType(name = "", propOrder =

{ "message", "data"}

, namespace = "")
public class PropertyOrderException extends Exception implements java.io.Serializable {
private static final long serialVersionUID = 1L;
@XmlElement(name = "message", required = true, nillable = true)
public String message;
@XmlElement(name = "data", required = true, nillable = true)
public ErrorData data;
public PropertyOrderException()

{ this.data = new ErrorData(); this.message = null; }

public PropertyOrderException(ErrorData data)

{ this.data = data; this.message = null; }

public PropertyOrderException(String message)

{ this.data = null; this.message = message; }

@Override
@XmlTransient
public String getMessage()

{ return this.message; }

}