I am on CentOS 7.2 with gluu 2.4.3 It can show the login page firstly when freshly installed. But when I stop the service and start it again. It redirect me to when i access https://<My_Host>/: https://10.73.207.92/oxauth/authorize?scope=openid+profile+email+user_name&response_type=code+id_token&nonce=nonce&redirect_uri=https%3A%2F%2F10.73.207.92%2Fidentity%2Fauthentication%2Fauthcode&client_id=%40%214E15.7209.C1C4.D5AA%210001%2134F8.C2BF%210008%21427F.E0E2 It then stuck to a blank white page and no response. I checked the tomcat log, It sounds like causing by: SEVERE: Exception unloading sessions to persistent storage java.lang.NoClassDefFoundError: com/google/protobuf/Message ...