this is more of an fyi..I updated my system today and guacamole broke. I noticed this in my tomcat logs.. Cause: java.sql.SQLException: The server time zone value 'CDT' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property).....
To get around this, I set the global timezone to match the timezone on the server. (confirm path of your OS timezone info) mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root MySQL then connect to instance and SET GLOBAL time_zone = America/Chicago; I don't know if this is a bug with the db or driver. it could be an intentional change. If its intentional, it might be handy to add a connection string option to guacamole.properties to handle this.
