Just find out the solution. It it not documented, but you add one line in /etc/glusterfs/glusterd.vol option rpc-auth-allow-insecure on then the error no longer occurs 2012/12/20, ??? <yongtaofu at gmail.com>: > Dear gluster experts, > > Recently I find if I run some normal gluster commands like gluster > volume create etc. The commands may fail randomly and the output is > "Connection failed. Please check if gluster daemon is operational." > Meanwhile the log says "Request received from non-privileged port". > > Why this happend? > > Thank you. > > -- > ??? > -- ???