Unable to login after migration from 7.11 to 17.2

Hi All,

We are not able to login to Appian application after starting of JBOSS (we upgraded system from 7.11 to 17.2).

While login in to Appian we are getting error as "The username/password entered is invalid. Usernames and passwords are case sensitive".

By looking to server logs we found below error.

INFO  [stdout] (http-0.0.0.0:8080-1) 2017-09-04 08:40:46,074 [http-0.0.0.0:8080-1] ERROR com.appiancorp.security.auth.AppianAuthenticationFailureHandler - Authentication failed. username=An error occurred while trying to initialize the session for ****** (Username).

Please help us in resolving the issue.

Thanks and Regards,

Someshwar