Custom worklist application integration with BPEL cluster

Question

Hi all,
I've setup a BPEL cluster using the Enterprise installation guide for 10.1.3.3.0. Currently we have a custom worklist application which is works when deployed on an installation SOA suite (10.1.3.1.0). The integration of claiming or setting an outcome works fine. We use the remote EJB to integrate with the workflow services.
However when testing the application on a cluster, we are getting the following log message in the log file for the custom application:
Questions:
1) What should be the value of the host name in the server URL since in a cluster a remote HTTP server. The HTTP server uses a virtual URL via the loadbalancer.
2) What should be the port number? Should it be the opmn request port from the $ORACLE_HOME/opmn/conf/opmn.xml
Anything else that i'm missing, please let me knoe.
Thanks in advance.
Log message:
08/03/31 23:11:05 at java.lang.Thread.run(Thread.java:595)
08/03/31 23:11:05 Caused by: ORABPEL-30509
Error in invoking task query service.
A client side error occured in invoking the task query service.
Please check the exception error stack to identify the error. Contact oracle support if error is not fixable.
08/03/31 23:11:05 at oracle.bpel.services.workflow.query.client.TaskQueryServiceRemoteClient.authenticate(TaskQueryServiceRemoteClient.java:118)
08/03/31 23:11:05 at ca.bell.rcss.services.taskmanagement.client.RemoteTaskServiceClient.getWorkflowContext(Unknown Source)
08/03/31 23:11:05 ... 38 more
08/03/31 23:11:05 Caused by: java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: oracle.bpel.services.workflow.verification.impl.WorkflowContext; local class incompatible: stream classdesc serialVersionUID = 6104875137687627481, local class serialVersionUID = 4086410548907188559
08/03/31 23:11:05 at com.evermind.server.rmi.RMICall.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(RMICall.java:109)
08/03/31 23:11:05 at com.evermind.server.rmi.RMICall.throwRecordedException(RMICall.java:125)
08/03/31 23:11:05 at com.evermind.server.rmi.RMIClientConnection.obtainRemoteMethodResponse(RMIClientConnection.java:517)
08/03/31 23:11:05 at com.evermind.server.rmi.RMIClientConnection.invokeMethod(RMIClientConnection.java:461)
08/03/31 23:11:05 at com.evermind.server.rmi.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:63)
08/03/31 23:11:05 at com.evermind.server.rmi.RecoverableRemoteInvocationHandler.invoke(RecoverableRemoteInvocationHandler.java:28)
08/03/31 23:11:05 at com.evermind.server.ejb.StatelessSessionRemoteInvocationHandler.invoke(StatelessSessionRemoteInvocationHandler.java:43)
08/03/31 23:11:05 at __Proxy1.authenticate(Unknown Source)

Answer 1

Some more information:
1) The integration from the integration/worklistapp works fine for the custom workflows.
2) I've tried using both the machine name and the http server name in the server url.
3) Snapshot of the wf_client_config.xml:
<servicesClientConfigurations xmlns="http://xmlns.oracle.com/bpel/services/client">
<ejb>
<serverURL>opmn:ormi://bangrcssdevsoa.sapient.com:6004:OC4J_SOA/hw_services</serverURL> <!-- for opmn managed instance -->
<user>oc4jadmin</user>
<password>iasadmin1</password>
<initialContextFactory>oracle.j2ee.rmi.RMIInitialContextFactory</initialContextFactory>
</ejb>