Hi,

 I get the following error when one webservice residing in the service mix 
called by another one which is a bpel application.


  | 16:18:41,869 ERROR [StartListener] could not start process instance
  | org.jbpm.graph.def.DelegationException
  |         at 
org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:367)
  |         at 
org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:358)
  |         at 
org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:358)
  |         at sun.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.bpel.graph.def.CompositeActivity$$EnhancerByCGLIB$$6b1056f4.raiseException(<generated>)
  |         at 
org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:358)
  |         at 
org.jbpm.graph.def.GraphElement.raiseException(GraphElement.java:358)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:110)
  |         at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.graph.def.Node$$EnhancerByCGLIB$$4e41da69.enter(<generated>)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at org.jbpm.bpel.graph.def.Activity.leave(Activity.java:184)
  |         at org.jbpm.bpel.graph.basic.Assign.execute(Assign.java:55)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:105)
  |         at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.graph.def.Node$$EnhancerByCGLIB$$4e41da69.enter(<generated>)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at org.jbpm.bpel.graph.def.Activity.leave(Activity.java:184)
  |         at org.jbpm.bpel.graph.basic.Invoke.execute(Invoke.java:47)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:105)
  |         at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.graph.def.Node$$EnhancerByCGLIB$$4e41da69.enter(<generated>)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at org.jbpm.bpel.graph.def.Activity.leave(Activity.java:184)
  |         at org.jbpm.bpel.graph.basic.Assign.execute(Assign.java:55)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:105)
  |         at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.graph.def.Node$$EnhancerByCGLIB$$4e41da69.enter(<generated>)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.bpel.graph.struct.StructuredActivity$Begin$$EnhancerByCGLIB$$8749bd97.leave(<generated>)
  |         at 
org.jbpm.bpel.graph.struct.StructuredActivity.execute(StructuredActivity.java:58)
  |         at 
org.jbpm.bpel.graph.struct.StructuredActivity$Begin.leave(StructuredActivity.java:222)
  |         at org.jbpm.graph.def.Node.execute(Node.java:349)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:105)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.bpel.graph.struct.StructuredActivity$Begin$$EnhancerByCGLIB$$8749bd97.enter(<generated>)
  |         at org.jbpm.graph.def.Transition.take(Transition.java:151)
  |         at org.jbpm.graph.def.Node.leave(Node.java:393)
  |         at org.jbpm.bpel.graph.def.Activity.leave(Activity.java:184)
  |         at 
org.jbpm.bpel.graph.struct.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:66)
  |         at org.jbpm.bpel.graph.basic.Receive.accept(Receive.java:81)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.bpel.graph.basic.Receive$$EnhancerByCGLIB$$7b6128d6.accept(<generated>)
  |         at 
org.jbpm.bpel.graph.struct.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:100)
  |         at org.jbpm.bpel.graph.struct.Sequence.accept(Sequence.java:104)
  |         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at 
org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:185)
  |         at 
org.jbpm.bpel.graph.def.Activity$$EnhancerByCGLIB$$87daeca1.accept(<generated>)
  |         at 
org.jbpm.bpel.graph.struct.ProcessInstanceStarter.visit(ProcessInstanceStarter.java:54)
  |         at 
org.jbpm.bpel.graph.def.BpelDefinition.messageReceived(BpelDefinition.java:111)
  |         at 
org.jbpm.bpel.integration.jms.StartListener.onMessage(StartListener.java:124)
  |         at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:696)
  |         at java.lang.Thread.run(Thread.java:595)
  | Caused by: java.lang.NullPointerException
  |         at 
org.jbpm.bpel.integration.client.SoapClient.writeDocumentPart(SoapClient.java:304)
  |         at 
org.jbpm.bpel.integration.client.SoapClient.writeDocumentBody(SoapClient.java:276)
  |         at 
org.jbpm.bpel.integration.client.SoapClient.writeMessage(SoapClient.java:196)
  |         at 
org.jbpm.bpel.integration.client.SoapClient.callImpl(SoapClient.java:143)
  |         at 
org.jbpm.bpel.integration.client.SoapClient.call(SoapClient.java:111)
  |         at 
org.jbpm.bpel.integration.jms.JmsIntegrationService.invoke(JmsIntegrationService.java:242)
  |         at org.jbpm.bpel.graph.basic.Invoke.execute(Invoke.java:46)
  |         at org.jbpm.bpel.graph.def.Activity.enter(Activity.java:105)
  |         ... 77 more
  | 


The first service  calls another ordinary service (fileread) and also another 
service (ftpinput) which is in service mix.

The bpel file is given below.



  | <?xml version="1.0" encoding="UTF-8"?>
  | <process name="BatchProductBusiness" 
targetNamespace="http://blwb.abc.com/getGlobalService";
  |   xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/";
  |   xmlns:tns="http://blwb.abc.com/getGlobalService";
  |   xmlns:bpel="http://schemas.xmlsoap.org/ws/2003/03/business-process/";
  |   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
  |   
xsi:schemaLocation="http://schemas.xmlsoap.org/ws/2003/03/business-process/
  |       http://schemas.xmlsoap.org/ws/2003/03/business-process/";>
  | 
  |   <partnerLinks>
  |     <!-- establishes the relationship with the caller agent -->
  |     <partnerLink name="caller" partnerLinkType="tns:BatchProduct-Caller"
  |       myRole="BatchProduct" />
  |       
  |     
  |       <partnerLink name="fileread" partnerLinkType="tns:filereadLT"
  |     partnerRole="FileRead" />
  |     
  |     
  |       <partnerLink name="ftpinput" partnerLinkType="tns:ftpinputLT"
  |     partnerRole="FetchService" />
  |     
  | 
  |   </partnerLinks>
  | 
  |   <variables>
  |     <!-- holds the incoming message -->
  |     <variable name="request" messageType="tns:nameMessage" />
  |     <!-- holds the outgoing message -->
  |     <variable name="response" messageType="tns:greetingMessage" />
  |     <variable name="getDunsDocumentRequest" 
messageType="tns:fileReadRequestMessage" />
  |     <variable name="getDunsDocumentResponse" 
messageType="tns:fileReadResponseMessage" />
  |   
  |   
  |     <variable name="getFileRequest" 
messageType="tns:ftpinputRequestMessage" />
  |         <variable name="getFileResponse" 
messageType="tns:ftpinputResponseMessage" />
  |     
  |     
  |     
  |       <variable name="POFault" messageType="tns:orderFaultType" />
  |       
  |       
  |   </variables>
  | 
  | 
  | <faultHandlers>
  | 
  |     <catch faultName="tns:cannotCompleteOrder" faultVariable="POFault">
  | 
  |       <reply partnerLink="caller" portType="tns:BatchProduct"
  |         operation="sayHello" variable="POFault"
  |         faultName="cannotCompleteOrder" />
  | 
  |     </catch>
  | 
  |   </faultHandlers>
  | 
  | 
  | 
  |   <sequence>
  | 
  |     <!-- receive the name of a person -->
  |     <receive operation="sayHello" partnerLink="caller" 
portType="tns:BatchProduct"
  |       variable="request" createInstance="yes" />
  | 
  | 
  | 
  |     <sequence>  
  |     
  |     
  |     
  |     
  |     <assign>
  |           <copy>
  |             <from variable="request" part="name" />
  |             <to variable="getDunsDocumentRequest" 
part="getDunsDocumentRequest" />
  |           </copy>
  |         </assign>
  |     
  |            
  |   
  |        
  |      <invoke partnerLink="fileread" portType="tns:FileRead"
  |     operation="getDunsDocument"   inputVariable="getDunsDocumentRequest"
  |     outputVariable="getDunsDocumentResponse">
  |     </invoke>
  | 
  | 
  |             <assign>
  |           <copy>
  |             <from variable="getDunsDocumentResponse" 
part="getDunsDocumentResponse" />
  |             <to variable="getFileRequest" part="getFileRequest" />
  |           </copy>
  |         </assign>
  |     
  | 
  |     
  | 
  |   <invoke partnerLink="ftpinput" portType="tns:FTPInputPortType"
  |     operation="getFile"   inputVariable="getFileRequest"
  |     outputVariable="getFileResponse">
  |     </invoke>
  | 
  |             <assign>
  |           <copy>
  |             <from variable="getFileResponse" part="getFileResponse" />
  |             <to variable="response" part="greeting" />
  |           </copy>
  |         </assign>
  |     
  |     
  | 
  | </sequence>
  | 
  |     <!-- reply with the greeting -->
  |     <reply operation="sayHello" partnerLink="caller" 
portType="tns:BatchProduct"
  |       variable="response" />
  |   </sequence>
  | 
  | </process>
  | 
  | 

The wsdl file is given below.


  | <?xml version="1.0" encoding="UTF-8"?>
  | <definitions targetNamespace="http://blwb.abc.com/getGlobalService";
  |   xmlns="http://schemas.xmlsoap.org/wsdl/";
  |   xmlns:pos="http://blwb.abc.com/getGlobalService";
  |   xmlns:xsd="http://www.w3.org/2001/XMLSchema";
  |   xmlns:plt="http://schemas.xmlsoap.org/ws/2003/05/partner-link/";
  |   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
  |   xsi:schemaLocation="http://schemas.xmlsoap.org/wsdl/ 
  |       http://schemas.xmlsoap.org/wsdl/
  |       http://schemas.xmlsoap.org/ws/2003/05/partner-link/ 
  |       http://schemas.xmlsoap.org/ws/2003/05/partner-link/";>
  | 
  |   <!-- characterizes the relationship between the greeter and its caller -->
  |   <plt:partnerLinkType name="BatchProduct-Caller">
  |     <plt:role name="BatchProduct">
  |       <plt:portType name="pos:BatchProduct" />
  |     </plt:role>
  |     <!-- the Caller does not provide services to the BatchProduct,
  |       this is why we omit the "Caller" role -->
  |   </plt:partnerLinkType>
  | 
  |     <plt:partnerLinkType name="filereadLT">
  |             <plt:role name="FileRead">
  |                     <plt:portType name="pos:FileRead" />
  |             </plt:role>
  |             
  |     </plt:partnerLinkType>
  | 
  | 
  | 
  | <plt:partnerLinkType name="ftpinputLT">
  |             <plt:role name="FetchService">
  |                     <plt:portType name="pos:FTPInputPortType" />
  |             </plt:role>
  |             
  |     </plt:partnerLinkType>
  | 
  | 
  | 
  |   <types>
  |     <xsd:schema>
  |       <xsd:import namespace="http://blwb.abc.com/getGlobalService";
  |         schemaLocation="bestlinkage.xsd" />
  |     </xsd:schema>
  |   </types>
  |   <!-- carries the name of a person -->
  |   <message name="nameMessage">
  |     <part name="name" type="xsd:string" />
  |   </message>
  | 
  |   <!-- carries the greeting -->
  |   <message name="greetingMessage">
  |     <part name="greeting" type="xsd:string" />
  |   </message>
  | <message name="fileReadRequestMessage">
  |             <part name="getDunsDocumentRequest" type="xsd:string" />
  |     </message>
  |     
  |     <message name="fileReadResponseMessage">
  |             <part name="getDunsDocumentResponse" type="xsd:string" />
  |     </message>
  |     
  |     
  |     <message name="ftpinputRequestMessage">
  |             <part name="getFileRequest" type="xsd:string" />
  |     </message>
  |     
  |     <message name="ftpinputResponseMessage">
  |             <part name="getFileResponse" type="xsd:string" />
  |     </message>
  |     
  |     
  |     
  |     
  |      <message name="orderFaultType">
  |     <part name="problemInfo" element="pos:problemInfo" />
  |   </message>
  |     
  |   <!-- describes the interface presented to callers -->
  |   <portType name="BatchProduct">
  |     <operation name="sayHello">
  |       <input message="pos:nameMessage" />
  |       <output message="pos:greetingMessage" />
  |       <fault name="cannotCompleteOrder" message="pos:orderFaultType" />
  |     </operation>
  |   </portType>
  | 
  |     <portType name="FileRead">
  |             <operation name="getDunsDocument">
  |                     <input message="pos:fileReadRequestMessage" />
  |                      <output message="pos:fileReadResponseMessage" />
  |             </operation>
  |     </portType>
  | 
  | <portType name="FTPInputPortType">
  |             <operation name="getFile">
  |                     <input message="pos:ftpinputRequestMessage" />
  |                      <output message="pos:ftpinputResponseMessage" />
  |             </operation>
  |     </portType>
  | 
  | </definitions>
  | 


The bpel-Application.xml is given below.


  | 
  | <?xml version="1.0" encoding="UTF-8"?>
  | <bpelApplication name="BatchProductBusiness" xmlns="http://jbpm.org/bpel";
  |   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
  |   xsi:schemaLocation="http://jbpm.org/bpel
  |       http://jbpm.org/bpel/bpel_application_1_0.xsd"; >
  |     <serviceCatalogs>
  |     <!-- listing of locally published WSDL documents -->
  |     <urlCatalog contextUrl="http://localhost:8080/";>
  |       <!-- published WSDL document of fileread service -->
  |       <wsdl location="fileread/fileread?wsdl"/>
  |      </urlCatalog>
  |     <urlCatalog contextUrl="http://localhost:8080/";>
  |        <!-- published WSDL document of ftpinput service -->
  |       <wsdl location="esb/jbi/ftpinservice/main.wsdl"/>
  |      
  |     </urlCatalog>
  |     
  |     
  |   </serviceCatalogs>   
  |   
  | </bpelApplication>
  |      
  | 

Please write to me where I am making the mistake ?

Thanks in advance,

Regards,
-veena-


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