Orbeon Upgrade to 2017.2 throwing errors on form edit

We are trying to upgrade from Orbeon 2016.2 to 2017.2 and getting below error while calling form edit.

|`oxf.xforms.state.manager.uuid-list-key` was not set in the session. Check your listeners.                            |

Cannot find any information in release notes regarding any entry to make older version forms work.

Any help would be highly appreciated.

Solution

That session key, oxf.xforms.state.manager.uuid-list-key, is created when a new session is created. This is done via web.xml:

<listener>
    <listener-class>org.orbeon.oxf.xforms.XFormsServletContextListener</listener-class>
</listener>

Could it be that you don't have the Orbeon Forms 2017.2 web.xml?