ViewExpiredException The view state of the page has expired

I was facing below exception when task flows are nested. Loading one task flow within another task flow causes below exception

javax.faces.application.ViewExpiredException: viewId:

The view state of the page has expired.  Reload the page.

Add CLIENT_STATE_MAX_TOKENS in the application web.xml. Make sure the token count is sufficient based on your application.

 
    CLIENT_STATE_MAX_TOKENS
    15
 

Oracle ADF 12c Observations

We have recently migrated our Oracle ADF BPM Application developed in 11.1.1.7 to 12.2.1.

Here with I would mentioned some of the findings during the 12c migration

First of all I would mention some of the components which are deprecated and had to fix immediately.

Oracle Adaptive Case Management ACM

Oracle Adaptive Case management feature is a very good extension of Oracle BPM which suits for the adaptive process model.

Below blogs talk more about the out of box and custom approaches to implement Oracle ACM

Oracle BPM : Case Management API's

https://blogs.oracle.com/VenugopalMangipudi/entry/obpm_case_management_api_s


https://blogs.oracle.com/VenugopalMangipudi/entry/obpm_case_management_api_s1

Adaptive Case Management 12c and ADF Human Tasks

http://andrejusb.blogspot.gr/2014/12/adaptive-case-management-12c-and-adf.html