Thread:Project:Support desk/Error writing to CDB file

I didn't change anything on my box and one day it suddenly have this:

Screenshot:

Http://i.imgur.com/rbmazsr.png

Env:

MySQL 5.5 PHP-FPM 5.4 MediaWiki 1.23.? I forgot.

cache/ has been set to 777, still not working.

Could anyone help me please, thanks.