[mythtv-users] backend always hangs on specific recording

Stephen Worthington stephen_agent at jsw.gen.nz
Wed Jun 12 11:36:29 UTC 2013


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?  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.  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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