Thank you for your answer . It is interested because in http://forum.keycloak.org/t/keycloak-v8-0-0-with-oracle-18c-with-driver-ojdbc8/991 wrote Member stianst :
Afraid Oracle 18 is not supported right now. We’re hoping this will be resolved in Keycloak 9, but it is a bit out of our control as we’re dependent on support in underlying WildFly container.
So it means for me there is a relationship between Oracle Release and Keycloak Release ?
And the problem were solved with edit standalone.bat
We have a dev environment and we will try and test it