Can't flush bind cache due to rndc: connect failed

I couldn't find a solution for this in the googles:

$ sudo rndc flushname somedomain.com
rndc: connect failed: 127.0.0.1#953: connection refused

Another symptom:

$ sudo service named restart
Stopping named: .                                          [  OK  ]
mount: block device /etc/rndc.key is write-protected, mounting read-only
mount: cannot mount block device /etc/rndc.key read-only
Starting named:                                            [  OK  ]

The setup:

$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.4 (Santiago)
$ rpm -q bind
bind-9.8.2-0.17.rc1.el6_4.6.x86_64

The fix:

# cd /var/named/chroot/
# cp /etc/rndc.key .
cp: overwrite `./rndc.key'? y
# /etc/init.d/named restart
# logout
$ sudo rndc flushname somedomain.com