title: Running Axis2 web service client is generating an error at the client and the server side
body: <p>The client side error is :</p>
  
  <pre><code>    0 [main] INFO org.ws.call.BankWSCallClass - callChequeCertificationWS...
  702 [main] INFO org.ws.call.BankWSCallClass - callChequeVerificationWS... serviceCreated
  702 [main] INFO org.ws.call.BankWSCallClass - callChequeVerificationWS... portCreated
  Exception in thread "main" org.apache.axis2.AxisFault: Exception occurred while trying to invoke service method chequeCertification
      at org.apache.axis2.util.Utils.getInboundFaultFromMessageContext(Utils.java:531)
      at org.apache.axis2.description.OutInAxisOperationClient.handleResponse(OutInAxisOperation.java:375)
      at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:421)
      at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229)
      at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165)
      at org.ws.server.implementation.ChequeProcessingServiceStub.chequeCertification(ChequeProcessingServiceStub.java:911)
      at org.ws.call.BankWSCallClass.callChequeCertificationWS(BankWSCallClass.java:53)
      at org.ws.call.BankWSCallClass.main(BankWSCallClass.java:106)
  </code></pre>
  
  <p>While the server side error is</p>
  
  <pre><code>    [#|2012-05-10T15:52:32.390+0300|INFO|glassfish3.1.2|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=79;_ThreadName=Thread-2;|[ERROR] Exception occurred while trying to invoke service method chequeCertification
  java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212)
      at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117)
      at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
      at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114)
      at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
      at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172)
      at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:688)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
      at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
      at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
      at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
      at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
      at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
      at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
      at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
      at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
      at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
      at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
      at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
      at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
      at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
      at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
      at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
      at java.lang.Thread.run(Thread.java:722)
  Caused by: java.lang.NullPointerException
      at org.ws.server.implementation.ChequeProcessingService.chequeCertification(ChequeProcessingService.java:18)
      ... 37 more
  |#]
  </code></pre>
  
  <p>Overview: i am using springsourcetool (similar to eclipse) as the development IDE. Glassfish as the application server. the web service is ChequeProcessingService, i generated the .aar file and deployed it under axis2 web project of glassfish. the client side code is generated using axis2 code generator tool, it is simply calling the web service method 'chequeCertification' that has a javabean request parameter and returns another javabean response object.</p>
  
  <p>Axis2 version that am using is 1.6.2 with JDK 1.7</p>
  
  <p>Kindly advice from where may come this problem. </p>