[mythtv-users] backend always hangs on specific recording

Marco Nelissen marco.nelissen at gmail.com
Wed Jun 12 21:06:33 UTC 2013


On Wed, Jun 12, 2013 at 4:36 AM, Stephen Worthington <
stephen_agent at jsw.gen.nz> wrote:

> On Tue, 11 Jun 2013 21:06:09 -0700, you wrote:
>
> >Tuesday afternoon at 1:30pm, mythtv is set to record 2 shows, and every
> >week when I come home Tuseday evening, I find that the backend is stuck:
> >the backend can't connect to it, and later scheduled recordings didn't
> >happen.
> >After killing and restarting the backend so that the frontend can connect
> >to it again and get the list of recordings, I see one recording shows up
> >with the "missing file" X next to it, while the other shows up as a 0
> sized
> >recording. If I try to play the 0-sized one, the backend seems to hang
> >again.
> >I can manually tune to the channels in question just fine, and I've
> >recorded two things simultaneously from those two channels too. There's
> >nothing in the log that indicates any kind of failure. Any idea why those
> >same scheduled recording would always cause the backend to hang?
>
> What version of MythTV are you using?


This is 0.25 (Mythbuntu, in case that matters).

 I used to get a similar problem
> to that on, IIRC, 0.24.  I upgraded to 0.25 and then quickly to 0.26,
> so I am not sure if 0.25 ever did it.  It was a deadlock situation,
> and I tended to get it at the same time each week, but it took more
> than two programs at once to trigger it for me.


I regularly record 2 or 3 programs at once without any issues. The case I
described above is the only one that consistently reproduces the problem.


>  In 0.26, I can still
> get a similar problem, but instead of a deadlock, mythbackend detects
> the lockup and restarts itself.  On restart, it records OK.  This is
> much better than having it stop recording, but I still miss a couple
> of minutes of recordings due to the time mythbackend takes to restart.
>
> In my case, if I already had recordings running at the time of the
> deadlock, those recordings would continue and end normally, but any
> new recordings would never start after that.  If it is like my
> problem, you may be able to prevent it from happening by getting one
> or other of the recordings to start a minute or two earlier.
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