what're the errors on lighttpd?

hello groups,

I saw lots of these errors on our lighttpd logs,

2007-05-08 11:49:10: (server.c.1240) [note] sockets
disabled,
connection limit reached
2007-05-08 11:49:10: (server.c.1240) [note] sockets
disabled,
connection limit reached
2007-05-08 11:49:11: (server.c.1207) [note] sockets enabled
again
2007-05-08 11:49:11: (server.c.1240) [note] sockets
disabled,
connection limit reached

what're them and how to resolve it?Thanks.

--jen