JAXB problem... a simple re-create of a problem I'm having with unmarshalling using JAXB. Fixed working version is at https://gist.github.com/dalelane/983f278d2485d29a6ef4

JaxbProblem.java

package sandbox;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;

public class JaxbProblem {

    //----------------------------------------
    // Output from running this sample
    //   when unmarshalling XML_WITH_SPACES it works - and unmarshalls all five items
    //   when unmarshalling XML_WITHOUT_SPACES it loses every other item
    //----------------------------------------
    // About to process a new XML document...
    // >one
    // >two
    // >three
    // >four
    // >five
    // About to process a new XML document...
    // >one
    // >three
    // >five
    
    
    
    // five items in XML fragments
    private static final String TEST1_STR = "<test key=\"one\"></test>";
    private static final String TEST2_STR = "<test key=\"two\"></test>";
    private static final String TEST3_STR = "<test key=\"three\"></test>";
    private static final String TEST4_STR = "<test key=\"four\"></test>";
    private static final String TEST5_STR = "<test key=\"five\"></test>";
    
    // combine the five items into XML documents - with and without whitespace in between
    private static final String XML_WITH_SPACES = 
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + 
                    "<jaxbissue>" + 
                        TEST1_STR + " " + TEST2_STR + " " + TEST3_STR + " " + TEST4_STR + " " + TEST5_STR + " " +
                    "</jaxbissue>";
    private static final String XML_WITHOUT_SPACES = 
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + 
                    "<jaxbissue>" + 
                        TEST1_STR + TEST2_STR + TEST3_STR + TEST4_STR + TEST5_STR + 
                    "</jaxbissue>";
    
    

    public static void main(String[] args)
    {
        String[] tests = { XML_WITH_SPACES, XML_WITHOUT_SPACES };
        for (String test : tests){
            
            System.out.println("About to process a new XML document...");
            
            try {
                // prepare a stream to read the XML document
                InputStream stream = new ByteArrayInputStream(test.getBytes());
                XMLStreamReader reader = XMLInputFactory.newInstance().createXMLStreamReader(stream);

                // prepare an unmarshaller to turn the XML into objects
                JAXBContext context = JAXBContext.newInstance(Test.class);
                Unmarshaller unmarshaller = context.createUnmarshaller();

                boolean running = true;
                while (running){
                    switch (reader.next()){
                        case XMLStreamConstants.START_ELEMENT:
                            if (reader.getLocalName().equals(Test.XMLELEMENTNAME)){
                                JAXBElement<Test> unmarshalledObj = unmarshaller.unmarshal(reader, Test.class);
                                Test item = unmarshalledObj.getValue();
                                System.out.println(">" + item.getKey());
                            }
                            break;
                        case XMLStreamConstants.END_DOCUMENT:
                            reader.close();
                            running = false;
                            break;
                    }
                }
            }
            catch (Exception exc){
                exc.printStackTrace();
            }
        }
    }
    
    
    
    @XmlRootElement(name=Test.XMLELEMENTNAME)
    public static class Test {
        
        public static final String XMLELEMENTNAME = "test";
        
        protected String key;

        @XmlAttribute
        public String getKey() {
            return key;
        }
        public void setKey(String value) {
            this.key = value;
        }
    }
}