Debugging No flow execution could be found with key 'e1s1'

[Herron, Joel D]

I’m seeing this error repeating in my logs and intermittent login errors being reported I’m sure it’s not a ton of users hitting back, wondering where I should start looking.

WARN [net.shibboleth.ext.spring.error.ExtendedMappingExceptionResolver:136] - Resolved
org.springframework.webflow.execution.repository.NoSuchFlowExecutionException:
    No flow execution could be found with key 'e1s1' -- perhaps this executing flow has ended or expired?
        This could happen if your users are relying on browser history (typically via the back button) that references ended flows.]
            to ModelAndView: reference to view with name 'error';
                model is {exception=org.springframework.webflow.execution.repository.NoSuchFlowExecutionException:
                    No flow execution could be found with key 'e1s1' -- perhaps this executing flow has ended or expired?
                        This could happen if your users are relying on browser history (typically via the back button) that references ended flows.,
                            request=org.apache.catalina.connector.RequestFacade at 43e48575, encoder=class net.shibboleth.utilities.java.support.codec.HTMLEncoder,
                                springContext=Root WebApplicationContext: startup date [Thu Dec 03 06:49:30 CST 2020]; root of context hierarchy}

The modelAndView with name error got me thinking it’s an issue with a view and I did change the view pages recently, but it’s been a few weeks and this seems to have just popped up.

Cheers,
--Joel
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