在TOMCAT运行正常的WEB SERVICE,布署在WEBLOGIC 时有问题

我是用JWS方式来发布WEB   SERVICE的,用TOMCAT布署时,WEB   SERVICE客户端调用没问题,但是用WEBLOGIC布署时,WEB   SERVICE   客户端调用出现以下问题,请各位指教
Exception   in   thread   "main"   AxisFault
  faultCode:   {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
  faultSubcode:  
  faultString:   java.lang.NullPointerException
  faultActor:  
  faultNode:  
  faultDetail:  
{http://xml.apache.org/axis/}hostname:yangxp

java.lang.NullPointerException
at   org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)
at   org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129)
at   org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
at   com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:633)
at   com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanEndElement(XMLNSDocumentScannerImpl.java:719)
at   com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
at   com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at   com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at   com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at   com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at   com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)
at   javax.xml.parsers.SAXParser.parse(SAXParser.java:375)
at   org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
at   org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
at   org.apache.axis.Message.getSOAPEnvelope(Message.java:435)
at   org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
at   org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
at   org.apache.axis.client.Call.invokeEngine(Call.java:2784)
at   org.apache.axis.client.Call.invoke(Call.java:2767)
at   org.apache.axis.client.Call.invoke(Call.java:2443)
at   org.apache.axis.client.Call.invoke(Call.java:2366)
at   org.apache.axis.client.Call.invoke(Call.java:1812)
at   stub.weblogicwsclient.MyServiceSoapBindingStub.processService(MyServiceSoapBindingStub.java:103)
at   stub.weblogicwsclient.StubClient.main(StubClient.java:14)