If a type used by a JAX-WS endpoint makes use of JAXBElement this causes a NullPointerException on deployment: -

@XmlElementRef(name = "myVar", type = JAXBElement.class)
protected JAXBElement<Id> myVar;

java.lang.NullPointerException
at org.jboss.ws.metadata.wsdl.xmlschema.JBossXSEntityResolver.getXMLInputSource(JBossXSEntityResolver.java:167)
at org.jboss.ws.metadata.wsdl.xmlschema.JBossXSEntityResolver.resolveEntity(JBossXSEntityResolver.java:135)
at org.apache.xerces.impl.XMLEntityManager.resolveEntity(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.resolveDocument(Unknown Source)
at org.apache.xerces.impl.xs.traversers.XSDHandler.resolveSchema(Unknown Source)
at org.apache.xerces.impl.xs.traversers.XSDHandler.constructTrees(Unknown Source)
at org.apache.xerces.impl.xs.traversers.XSDHandler.parseSchema(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
at org.jboss.ws.tools.JavaToXSD.parseSchema(JavaToXSD.java:182)
at org.jboss.ws.tools.wsdl.WSDL11Reader.processTypes(WSDL11Reader.java:391)
at org.jboss.ws.tools.wsdl.WSDL11Reader.processTypes(WSDL11Reader.java:406)
at org.jboss.ws.tools.wsdl.WSDL11Reader.processDefinition(WSDL11Reader.java:172)
at org.jboss.ws.tools.wsdl.WSDLDefinitionsFactory.parse(WSDLDefinitionsFactory.java:128)
at org.jboss.ws.metadata.builder.jaxws.JAXWSWebServiceMetaDataBuilder.processOrGenerateWSDL(JAXWSWebServiceMetaDataBuilder.java:373)
at org.jboss.ws.metadata.builder.jaxws.JAXWSWebServiceMetaDataBuilder.buildWebServiceMetaData(JAXWSWebServiceMetaDataBuilder.java:158)
at org.jboss.ws.metadata.builder.jaxws.JAXWSServerMetaDataBuilder.setupProviderOrWebService(JAXWSServerMetaDataBuilder.java:50)
at org.jboss.ws.metadata.builder.jaxws.JAXWSMetaDataBuilderJSE.buildMetaData(JAXWSMetaDataBuilderJSE.java:63)
at org.jboss.wsf.stack.jbws.UnifiedMetaDataDeploymentAspect.create(UnifiedMetaDataDeploymentAspect.java:66)
at org.jboss.wsf.framework.deployment.DeploymentAspectManagerImpl.deploy(DeploymentAspectManagerImpl.java:115)
at org.jboss.wsf.container.jboss42.ArchiveDeployerHook.deploy(ArchiveDeployerHook.java:97)
at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:90)