mysql: [ERROR] Fatal error in defaults handling. Program aborted!
root@liuxg:/snap/bin# systemctl status -l snap.tomcat-webapp-demo.mysql
● snap.tomcat-webapp-demo.mysql.service - Service for snap application tomcat-webapp-demo.mysql
   Loaded: loaded (/etc/systemd/system/snap.tomcat-webapp-demo.mysql.service; enabled; vendor preset
   Active: active (running) since 五 2016-08-12 07:10:05 CST; 14min ago
 Main PID: 2677 (start_mysql)
    Tasks: 2
   Memory: 28.8M
      CPU: 2.730s
   CGroup: /system.slice/snap.tomcat-webapp-demo.mysql.service
           ├─2677 /bin/sh /snap/tomcat-webapp-demo/x1/bin/start_mysql
           └─4333 sleep 1

8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: dump the root option file
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: [client]
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: socket=/var/snap/tomcat-webapp-demo/x1/mysql/mysql.
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: user=root
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: Setting up users and owncloud database... ERROR 200
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: Failed to initialize-- reverting...
8月 12 07:10:18 liuxg ubuntu-core-launcher[2677]: Shutting down MySQL
8月 12 07:10:19 liuxg ubuntu-core-launcher[2677]: ..
8月 12 07:10:19 liuxg ubuntu-core-launcher[2677]: writing root password
8月 12 07:10:19 liuxg ubuntu-core-launcher[2677]: Waiting for server...