> Server crash almost every week once or twice with this message.
>
> I found in server log messages all within one second:
>
> Fatal lock manager error: invalid lock id (19936), errno: 107
> INET/inet_error: connect errno = 111
> /opt/firebird/bin/fbguard: guardian starting bin/fbserver
>
> Does one know what is my problem?

People, ALWAYS tell exact Firebird version, always !

Regards,
Vlad