mysql help

I'm running a server for a game and whenever I run it, I get the
com-mysql-jdbc-exceptions-jdbc4-communicationsexception-communications-link-failure

Last packet sent 0 milliseconds ago etc etc error, but nothing after that.
I've tried updating my connector and everything, but it just wont work.

PS, Sorry if this is in the wrong area, I was told it was.

Looks like it's having a problem connecting.

Are you sure the mysql server is running? The game settings have the correct username/password ? -I think the error means "unable to connect", not "invalid password", but double check.

Can you connect to it and view the database tables using mysql workbench or anything else?
MySQL :: Download MySQL Workbench