A curious Error

[Ron Hall]

Howdy

Last night the named processed died and gave me the following error:

Sep  2 03:08:07 kona named[25165]: general: info: zone 
104.216.132.in-addr.arpa/IN: refresh: failure trying master 
132.206.85.21#53: timed out
Sep  2 03:08:07 kona named[25165]: general: warning: unknown control 
channel command 'null'
Sep  2 03:08:07 kona named[25165]: general: info: shutting down: 
flushing changes
Sep  2 03:08:07 kona named[25165]: general: notice: stopping command 
channel on 0.0.0.0#953

Now a google for the "unknown control channel command" error yields only 
the source code and this error
appears at the end of a very long "case" statement. Which already tells 
me it should never happen or at least
happen once in several blue moons.

Now the line immediately above is an xfer from an AD server for which we 
are secondary.
Additionally there was a considerable "drift" in the time, so that the 
primary lagged (badly)
behind the secondary.

I have never seen this error before and I am somewhat curious as to what 
caused it and how
it can be avoided.


Thanks


Ron Hall
McGill University
NCS - Enterprise Systems