src/main/java/org/keycloak/protocol/cas/CASLoginProtocol.java

@@ -121,7 +121,7 @@
    }

    @Override
    public void backchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
    public Response backchannelLogout(UserSessionModel userSession, AuthenticatedClientSessionModel clientSession) {
        String logoutUrl = clientSession.getRedirectUri();
        String serviceTicket = clientSession.getNote(CASLoginProtocol.SESSION_SERVICE_TICKET);
        //check if session is fully authenticated (i.e. serviceValidate has been called)
@@ -130,6 +130,7 @@
        }
        ClientModel client = clientSession.getClient();
        new ResourceAdminManager(session).logoutClientSession(realm, client, clientSession);
        return Response.ok().build();
    }

    private void sendSingleLogoutRequest(String logoutUrl, String serviceTicket) {