javax.xml.bind.UnmarshalException - with linked exception: [javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1] Message: Premature end of file.]

 javax.xml.bind.UnmarshalException
 - with linked exception:
[javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1]
Message: Premature end of file.]

You are getting the error because the InputStream has been advanced to the end during the output

Here is the code I used

xmlValidatorService.setOpsReport(false);List errorList = 

    xmlValidatorService.runValidation(inputStream);

JAXBContext jaxbContext = JAXBContext.newInstance(WellsJaxb.class);

XMLStreamReader xsr = XMLInputFactory.newFactory().createXMLStreamReader

                                 (inputStream);
Unmarshaller um = jaxbContext.createUnmarshaller();

wellsJaxb = (WellsJaxb)  um.unmarshal(xsr);