Portal & Worklist Integration Problem: The Worklist service is unavailable

(Doc ID 1991175.1)

Last updated on MARCH 08, 2017

Applies to:

Oracle WebCenter Portal - Version 11.1.1.8.5 and later
Information in this document applies to any platform.

Symptoms

Environment:
------------------
Oracle WebCenter Portal (WCP) 11.1.1.8.5 has been integrated with SOA/BPM 11.1.1.7.6, using the following documentation:

http://docs.oracle.com/cd/E29542_01/webcenter.1111/e27738/wcadm_worklist.htm#WCADM176
Fusion Middleware Administering Oracle WebCenter Portal
20 Managing Worklists

SOA and WCP are on the same domain and share the same AD identity store.

Issue:
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Webcenter Portal and the Worklist service have been integrated.
After following the integration steps and adding the task flow to a WCP page, it shows the following error: The Worklist service is unavailable.

Error:
-------
The log files show:

<Unable to query BPEL repository. oracle.webcenter.concurrent.ExecutionException: oracle/webcenter/bpel/config/BPELHelper service : Worklist resource : BPMWorklist source : oracle.webcenter.concurrent.CallableTask@233b2bb1 Caused By: java.lang.NoClassDefFoundError: oracle/webcenter/bpel/config/BPELHelper


In the GUI, it shows:
  The Worklist service is unavailable

Steps to reproduce the error/issue:
-----------------------------------------------
1. Follow the integration steps: http://docs.oracle.com/cd/E29542_01/webcenter.1111/e27738/wcadm_worklist.htm#WCADM176
2. Create a portal in WCP.
3. Try to add the Worklist Taskflow to the portal page.


Cause

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