Exception in thread "main" java.lang.NoClassDefFoundError: org/jvnet/staxex/XMLStreamReaderEx
  at com.sun.xml.stream.buffer.stax.StreamReaderBufferCreator.storeElementAndChildren(StreamReaderBufferCreator.java:174)
  at com.sun.xml.stream.buffer.stax.StreamReaderBufferCreator.storeDocumentAndChildren(StreamReaderBufferCreator.java:158)
  at com.sun.xml.stream.buffer.stax.StreamReaderBufferCreator.store(StreamReaderBufferCreator.java:139)
  at com.sun.xml.stream.buffer.stax.StreamReaderBufferCreator.create(StreamReaderBufferCreator.java:82)
  at com.sun.xml.stream.buffer.MutableXMLStreamBuffer.createFromXMLStreamReader(MutableXMLStreamBuffer.java:113)
  at com.sun.xml.stream.buffer.XMLStreamBuffer.createNewBufferFromXMLStreamReader(XMLStreamBuffer.java:398)
  at com.sun.xml.ws.api.addressing.WSEndpointReference.<init>(WSEndpointReference.java:174)
  at com.sun.xml.ws.api.addressing.WSEndpointReference.<init>(WSEndpointReference.java:166)
  at com.sun.xml.ws.api.addressing.AddressingVersion.<init>(AddressingVersion.java:436)
  at com.sun.xml.ws.api.addressing.AddressingVersion.<init>(AddressingVersion.java:67)
  at com.sun.xml.ws.api.addressing.AddressingVersion$1.<init>(AddressingVersion.java:146)
  at com.sun.xml.ws.api.addressing.AddressingVersion.<clinit>(AddressingVersion.java:69)
  at com.sun.tools.ws.wsdl.parser.MemberSubmissionAddressingExtensionHandler.getNamespaceURI(MemberSubmissionAddressingExtensionHandler.java:62)
  at com.sun.tools.ws.wsdl.parser.WSDLParser.register(WSDLParser.java:129)
  at com.sun.tools.ws.wsdl.parser.WSDLParser.<init>(WSDLParser.java:119)
  at com.sun.tools.ws.processor.modeler.wsdl.WSDLModeler.buildModel(WSDLModeler.java:109)
  at com.sun.tools.ws.wscompile.WsimportTool.run(WsimportTool.java:183)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at com.sun.tools.ws.Invoker.invoke(Invoker.java:116)
  at com.sun.tools.ws.WsImport.main(WsImport.java:52)
 erEx
Solution:
 During the setup of Metro 1.5 I had also copied the webservices-rt.jar and other files in JDK_HOME/jre/lib/endorsed directory.
 Removing the files from endorsed directory removed this error and led to generation of files.