javax.xml.stream.XMLStreamException: Prefix cannot be null
at org.apache.cxf.staxutils.StreamWriterContentHandler.startElement(StreamWriterContentHandler.java:242) [cxf-common-utilities.jar:2.3.2]
at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:551) [:1.6.0_20]
at com.sun.xml.bind.v2.runtime.output.SAXOutput.endStartTag(SAXOutput.java:124) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.XMLSerializer.leafElement(XMLSerializer.java:324) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$1.writeLeafElement(RuntimeBuiltinLeafInfoImpl.java:210) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$1.writeLeafElement(RuntimeBuiltinLeafInfoImpl.java:209) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.writeLeafElement(TransducedAccessor.java:250) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.property.SingleElementLeafProperty.serializeBody(SingleElementLeafProperty.java:98) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:340) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:593) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:324) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:494) [jaxb-impl-2.2.jar:2.2]
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:315) [jaxb-impl-2.2.jar:2.2]
... 37 more
Caused by: javax.xml.stream.XMLStreamException: Prefix cannot be null
at com.sun.xml.internal.stream.writers.XMLStreamWriterImpl.writeStartElement(XMLStreamWriterImpl.java:1291) [:1.6.0_20]
at com.sun.xml.internal.stream.writers.XMLStreamWriterImpl.writeStartElement(XMLStreamWriterImpl.java:1269) [:1.6.0_20]
at org.apache.cxf.staxutils.StreamWriterContentHandler.startElement(StreamWriterContentHandler.java:203) [cxf-common-utilities.jar:2.3.2]
... 49 more