Server down now won't let me play

A myslq log file grew too big, because of that there was no free space on the hard drive.
Because of that characters could not be saved. Thus your character actually stayed online if you tried to logout until it coould be saved.

I deleted the log files and transfered some old backups.
As soon as there was free space on the hard drive. The server saved the accounts and everyone was able to login again