[mythtv] Frontend-Backend communication: UNKNOWN_COMMAND

[James Purl]

Another data point here. I've had the frontend-backend combination
produce it most frequently, while watching LiveTV.  When I leave it
alone, it seems to record okay, but I've seen it happen when no
frontends were in action.  The system is b0rked after it happens and
the master backend needs to be restarted.  Using Myth CVS (20050329-1)
updated this past Thursday after Isaac began tweaking things in an
attempt to fix the slave-master "UNKNOWN COMMAND" loops.  If it'd
help, I can provide any logs in addition to the net sniff Brian Foddy
already posted in response to that thread. I am not up to speed enough
on the internals of Myth/QT's net/socket protocols to submit a patch.

On Apr 10, 2005 1:43 AM, Duncan Kennington <zilla at paradise.net.nz> wrote:
> I am seeing the same behaviour on mine (CVS 20050329-1).  The backend
> doesn't appear to have crashed, as such, but as you say, the communication
> between the frontend and the backend breaks down.  The frontend has timeouts
> and unexpected responses to MYTH_PROTO_VERSION (nothing).  I have found a
> restart of the backend brings it back to life for an undetermined period of
> time (but never more than around 10 minutes).
> 
> Is there anything I can do to try to find the cause of this?  There is
> another thread along the same lines as this - someone has attached a network
> sniffer log already.
> 
> Duncan
> 
> -----Original Message-----
> From: Nick Rosier [mailto:nick.rosier at gmail.com]
> Sent: Sunday, 10 April 2005 8:25 a.m.
> To: Development of mythtv
> Subject: [mythtv] Frontend-Backend communication: UNKNOWN_COMMAND
> 
> MythTV CVS (compiled 30 minutes ago); backend and frontend running on the
> same box.
> After using the frontend a while, I get UNKNOWN_COMMAND errors.
> 
> Example; deleted a recording, exited the recordings screen and went back in
> and I get a message there are no recordings available:
> 
> Frontend:
> 2005-04-09 22:21:04.220 All Programs
> 2005-04-09 22:21:05.062 write->12 21      QUERY_RECORDINGS Play:
> 
> Backend:
> 2005-04-09 22:21:05.062 Unknown command:
> 2005-04-09 22:21:05.062 15      UNKNOWN_COMMAND
> 2005-04-09 22:21:05.073 Unknown command:
> 2005-04-09 22:21:05.083 15      UNKNOWN_COMMAND
> 2005-04-09 22:21:05.121 Unknown command:
> 2005-04-09 22:21:05.121 15      UNKNOWN_COMMAND
> 2005-04-09 22:21:05.126 Unknown command:
> 2005-04-09 22:21:05.126 15      UNKNOWN_COMMAND
> 
> This started a couple of days ago; anyone else seeing this behaviour?
> 
> N.
> 
> 
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