ResultSet XML Conversion Error

Question

Hi,
BPEL, SOA 11g, DB2 Stored procedure,
In a BPEL service I am getting this error while invoking a DB2 Stored procedure with Strong XSD. I am using assign to copy the input parameter to the input parameters of Stored procedure.
not able to figure out why this error message is coming.
java.lang.Exception: oracle.sysman.emSDK.webservices.wsdlapi.SoapTestException: Exception occured when binding was invoked. Exception occured during invocation of JCA binding: "JCA Binding execute of Reference operation 'JDE_DBA' failed due to: ResultSet XML Conversion Error. An error occurred while converting from a ResultSet to XML. Unable to convert a ResultSet to XML. Cause: java.lang.NullPointerException ". The invoked JCA adapter raised a resource exception. Please examine the above error message carefully to determine a resolution. at oracle.sysman.emas.model.wsmgt.WSTestModel.invokeOperation(WSTestModel.java:575) at oracle.sysman.emas.view.wsmgt.WSView.invokeOperation(WSView.java:381) at oracle.sysman.emas.view.wsmgt.WSView.invokeOperation(WSView.java:298) 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:597) at com.sun.el.parser.AstValue.invoke(AstValue.java:157) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283) a
---------------- BPEL Code --------
<?xml version = "1.0" encoding = "UTF-8" ?>
<!--
Oracle JDeveloper BPEL Designer
Created: Fri Dec 10 10:24:23 PST 2010
Author: chaitanyad
Purpose: Synchronous BPEL Process
-->
<process name="UPCMatchOrder"
targetNamespace="http://xmlns.oracle.com/CD_JDE_Application_jws/JDE_UPCMatchOrder/UPCMatchOrder"
xmlns="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
xmlns:client="http://xmlns.oracle.com/CD_JDE_Application_jws/JDE_UPCMatchOrder/UPCMatchOrder"
xmlns:ora="http://schemas.oracle.com/xpath/extension"
xmlns:bpelx="http://schemas.oracle.com/bpel/extension"
xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/"
xmlns:ns1="http://xmlns.oracle.com/pcbpel/adapter/db/CD_JDE_Application/JDE_UPCMatchOrder/JDE_DBA"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ns2="http://xmlns.oracle.com/pcbpel/adapter/db/QAMODA73/X56714P/">
<!--
PARTNERLINKS
List of services participating in this BPEL process
-->
<partnerLinks>
<!--
The 'client' role represents the requester of this service. It is
used for callback. The location and correlation information associated
with the client role are automatically set using WS-Addressing.
-->
<partnerLink name="upcmatchorder_client" partnerLinkType="client:UPCMatchOrder" myRole="UPCMatchOrderProvider"/>
<partnerLink name="JDE_DBA" partnerRole="JDE_DBA_role"
partnerLinkType="ns1:JDE_DBA_plt"/>
</partnerLinks>
<!--
VARIABLES
List of messages and XML documents used within this BPEL process
-->
<variables>
<!-- Reference to the message passed as input during initiation -->
<variable name="inputVariable" messageType="client:UPCMatchOrderRequestMessage"/>
<!-- Reference to the message that will be returned to the requester-->
<variable name="outputVariable" messageType="client:UPCMatchOrderResponseMessage"/>
<variable name="Invoke_1_InputVariable" messageType="ns1:args_in_msg"/>
<variable name="Invoke_1_OutputVariable" messageType="ns1:args_out_msg"/>
</variables>
<!--
ORCHESTRATION LOGIC
Set of activities coordinating the flow of messages across the
services integrated within this business process
-->
<sequence name="main">
<!-- Receive input from requestor. (Note: This maps to operation defined in UPCMatchOrder.wsdl) -->
<receive name="receiveInput" partnerLink="upcmatchorder_client" portType="client:UPCMatchOrder" operation="process" variable="inputVariable" createInstance="yes"/>
<!-- Generate reply to synchronous request -->
<assign name="Assign_3">
<copy>
<from variable="inputVariable" part="InputMessage"/>
<to variable="Invoke_1_InputVariable" part="InputParameters"/>
</copy>
</assign>
<invoke name="Invoke_1" inputVariable="Invoke_1_InputVariable"
outputVariable="Invoke_1_OutputVariable" partnerLink="JDE_DBA"
portType="ns1:JDE_DBA_ptt" operation="JDE_DBA"/>
<assign name="Assign_2">
<copy>
<from variable="Invoke_1_OutputVariable" part="OutputParameters"/>
<to variable="outputVariable" part="OutputMessage"/>
</copy>
</assign>
<reply name="replyOutput" partnerLink="upcmatchorder_client" portType="client:UPCMatchOrder" operation="process" variable="outputVariable"/>
</sequence>
</process>
Regards,
-CD

Answer 1

Hi Sanjay,
The JDBC sender adapter returns the rows selected from the database in the follwoing format.
<resultset>
<row>
<column-name1>column-value</ column-name1>
<column-name2>column-value</ column-name2>
<column-name3>column-value</ column-name3>
</row>
<row>
<column-name1>column-value</ column-name1>
<column-name2>column-value</ column-name2>
<column-name3>column-value</ column-name3>
</row>
</resultset>
This error occurs , when the source datatype you have created for the JDBC adapter does not match with this format. I would suggest that you check the source format along with the occurence of your field.
Regards,
Bhavesh