Re: Null Pointer from org.apache.axis.message.MessageElement.addTextNode

Mon, 05 Sep 2005 23:31:46 -0700

Did you try verifying what is being sent on wire to the server using TCPMon?
Start TCPmon on some port and redirect the content to the tomcat host and port. Make sure you give tcpmon port in the portQName string rather than the tomcat port
 
Assuming I would like to start tcpmon on 9090 and have my tomcat on local machine 8080. I'd start tcpmon as
java org.apache.axis.utils.tcpmon 9090 localhost 8080
 
HTH
Jayachandra
 
On 9/5/05, Chris Mannion <[EMAIL PROTECTED]> wrote:
Hi
 
I'm getting a null pointer exception on invoking a call object.  This happens for any call with parameters set, though I'm certain, from having debugged the code, that it is not 'caused by passing nulls for parameter values, the exception occurs even on calls where all the values are present and correctly typed.  The stack trace for the error is below
 
AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode:
 faultString: java.lang.NullPointerException
 faultActor:
 faultNode:
 faultDetail:
 { http://xml.apache.org/axis/}stackTrace:java.lang.NullPointerException
 at org.apache.axis.message.MessageElement.addTextNode(MessageElement.java:1396)
 at org.apache.axis.message.SOAPHandler.addTextNode(SOAPHandler.java :148)
 at org.apache.axis.message.SOAPHandler.endElement(SOAPHandler.java:112)
 at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
 at org.apache.xerces.parsers.AbstractSAXParser.endElement (Unknown Source)
 at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
 at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
 at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
 at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
 at javax.xml.parsers.SAXParser.parse(Unknown Source)
 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:424)
 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:2765)
 at org.apache.axis.client.Call.invoke(Call.java:2748)
 at org.apache.axis.client.Call.invoke(Call.java:2424)
 at org.apache.axis.client.Call.invoke(Call.java:2347)
 at org.apache.axis.client.Call.invoke(Call.java:1804)
 at govConnect.WebServiceTools.call(WebServiceTools.java :130)
 at ep.callWS.service(callWS.java:65)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:419)
 at org.apache.catalina.servlets.InvokerServlet.doGet (InvokerServlet.java:133)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:237)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardContextValve.invokeInternal (StandardContextValve.java:198)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
 at org.apache.catalina.core.StandardValveContext.invokeNext (StandardValveContext.java:104)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
 at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:520)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:520)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
 at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
 at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:793)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
 at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
 at java.lang.Thread.run(Thread.java:536)
 
 
java.lang.NullPointerException
 at org.apache.axis.AxisFault.makeFault(AxisFault.java:101)
 at org.apache.axis.client.AxisClient.invoke(AxisClient.java:216)
 at org.apache.axis.client.Call.invokeEngine (Call.java:2765)
 at org.apache.axis.client.Call.invoke(Call.java:2748)
 at org.apache.axis.client.Call.invoke(Call.java:2424)
 at org.apache.axis.client.Call.invoke(Call.java:2347)
 at org.apache.axis.client.Call.invoke (Call.java:1804)
 at govConnect.WebServiceTools.call(WebServiceTools.java:130)
 at ep.callWS.service(callWS.java:65)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.servlets.InvokerServlet.serveRequest (InvokerServlet.java:419)
 at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:133)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
 at javax.servlet.http.HttpServlet.service (HttpServlet.java:810)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:520)
 at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:137)
 at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
 at org.apache.catalina.core.StandardValveContext.invokeNext (StandardValveContext.java:102)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.core.StandardValveContext.invokeNext (StandardValveContext.java:104)
 at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
 at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
 at org.apache.coyote.tomcat5.CoyoteAdapter.service (CoyoteAdapter.java:160)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:793)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
 at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
 at java.lang.Thread.run(Thread.java:536)
Caused by: java.lang.NullPointerException
 at org.apache.axis.message.MessageElement.addTextNode(MessageElement.java:1396)
 at org.apache.axis.message.SOAPHandler.addTextNode(SOAPHandler.java:148)
 at org.apache.axis.message.SOAPHandler.endElement (SOAPHandler.java:112)
 at org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
 at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
 at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement (Unknown Source)
 at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
 at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
 at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
 at org.apache.xerces.parsers.AbstractSAXParser.parse (Unknown Source)
 at javax.xml.parsers.SAXParser.parse(Unknown Source)
 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:424)
 at org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
 at org.apache.axis.client.AxisClient.invoke(AxisClient.java :206)
 ... 36 more
 
The code generating the error is as follows
 
ServiceFactory serviceFactory = ServiceFactory.newInstance();
webService = serviceFactory.createService(wsdlUrl, serviceQName);
...
Call opCall = webService.createCall(portQName, operationName);
...
return opCall.invoke(values);
 
where values is an object array of correctly typed parameter values.  Does anyone have any hints as to what the root of this problem might be?

Chris Mannion
IT Junction
020 8452 4274



--
-- Jaya

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