lighttpd forum lighty > od_proxy_core.c.940: (error)

Hello ,

 I am receiving following log report,(My web server is lighthttpd)


od_proxy_core.c.940: (error) connect(unix:/tmp/php-fastcgi.sock) failed: 
Resource temporarily unavailable (11)

mod_proxy_core.c.1455: (trace) connecting to address 
unix:/tmp/php-fastcgi.sock (0x80d94d8) failed, disabling for 60 sec

mod_proxy_core.c.2336: (trace) backlog: all addresses are down, putting 
/download.php (19) into the backlog, retry = 2

Could you please help me to find out what exactly the meaning of the 
error message.

Thank you