Deploying a bottom-up webservice, which uses complex messages (compiled from eGIF/UBL2 schemas), results in a NPE as shown below:
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)
at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy45.start(Unknown Source)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy9.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:610)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:274)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225)

Generating a WSDL from classes using wsprovide and afterwards way back to code using wsconsume results in a web service that on deployment produces the very same error, although wsprovide/wsconsume work flawlessly. See the mentioned forum thread for more information or take a look at
http://page.mi.fu-berlin.de/schmidtm/jbossws-jaxb/
where the mentioned WSDL along with an eclipse/ant project that generates a deployable WAR can be found and used to reproduce the problem.