[mythtv-users] Frequent backend crashes

[Bryan Dagerman]

My mythbackend process started crashing while sitting idle or during
playback within the last week. It hasn't yet crashed while recording. The
crash happens quite frequently, about every 45 minutes on average. This is
the message from systemd when the crash happens:

Apr 21 18:55:38 apollo mythbackend[16054]: 2014-04-21 18:55:38.055362 C
>  MainServer::HandleVersion - Client speaks protocol version 8 but we speak
> 77!
> Apr 21 18:55:42 apollo mythbackend[16054]: 2014-04-21 18:55:42.272493 C
>  MainServer::HandleVersion - Client speaks protocol version 8 but we speak
> 77!
> Apr 21 18:55:47 apollo mythbackend[16054]: 2014-04-21 18:55:47.491242 C
>  MainServer::HandleVersion - Client speaks protocol version 8 but we speak
> 77!
> Apr 21 18:55:52 apollo mythbackend[16054]: (process:16054): GLib-ERROR **:
> Creating pipes for GWakeup: Too many open files
> Apr 21 18:55:52 apollo kernel: traps: mythbackend[19001] trap int3
> ip:7faa5b8f9993 sp:7fa7aa76bb70 error:0
> Apr 21 18:56:01 apollo systemd-coredump[19002]: Core too large, core will
> not be stored.
> Apr 21 18:56:01 apollo systemd-coredump[19002]: Process 16054
> (mythbackend) dumped core.
> Apr 21 18:56:02 apollo systemd[1]: mythbackend.service: main process
> exited, code=killed, status=5/TRAP
> Apr 21 18:56:09 apollo mythshutdown[19003]: Setting scheduled wakeup time:
> Attempting to connect to master server...
> Apr 21 18:56:10 apollo mythshutdown[19003]: Setting scheduled wakeup time:
> Could not connect to master server!
> Apr 21 18:56:10 apollo systemd[1]: mythbackend.service: control process
> exited, code=exited status=1
> Apr 21 18:56:10 apollo systemd[1]: Unit mythbackend.service entered failed
> state.


Googling the error hasn't provided much help. The client protocol message
starts right after the backend starts, repeating every 5 or so seconds. I'm
not sure if it is related or what client it is referring to. The frontend
(on a different machine) is running  v0.27, network protocol 77. The
backend displays the protocol message even when the frontend isn't running.

I'm running Arch with the latest package updates. Here is the version
report:

mythbackend --version
> Please attach all output as a file in bug reports.
> MythTV Version : 317d5b7
> MythTV Branch : tag: v0.27
> Network Protocol : 77
> Library API : 0.27.20130902-1
> QT Version : 4.8.5
> Options compiled in:
>  linux profile use_hidesyms using_alsa using_oss using_pulse
> using_pulseoutput using_backend using_bindings_perl using_bindings_python
> using_bindings_php using_dvb using_firewire using_frontend using_hdhomerun
> using_ceton using_hdpvr using_ivtv using_joystick_menu using_libcec
> using_libcrypto using_libdns_sd using_libfftw3 using_libxml2 using_libudf
> using_lirc using_mheg using_opengl using_opengl_video using_qtwebkit
> using_qtscript using_qtdbus using_taglib using_v4l2 using_x11 using_xrandr
> using_xv using_profiletype using_mythlogserver using_bindings_perl
> using_bindings_python using_bindings_php using_mythtranscode using_opengl
> using_vaapi using_vdpau using_ffmpeg_threads using_mheg using_libass
> using_libxml2 using_libudf


Here is a typical log file, set on debug logtype.
http://pastebin.com/awrgTixY

Any help would be appreciated. I set up systemd to automatically restart
the backend if it crashes. I'm hoping it doesn't start crashing during
recording.

Thanks
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20140421/c1240d39/attachment.html>