Public bug reported:

I usually leave Clementine running all the time in the background,
playing music most of the time.  After a week or so, clementine will
still make animations with progress bars and changing playlist, but does
not make any sound.  I see these messages on stderr:

(clementine:27280): GStreamer-CRITICAL **: gst_poll_write_control: assertion 
'set != NULL' failed
(clementine:27280): GStreamer-CRITICAL **: gst_poll_free: assertion 'set != 
NULL' failed
The per-process limit on the number of open file descriptors has been reached.
ERROR: cannot create wakeup pipe
The per-process limit on the number of open file descriptors has been reached.
ERROR: cannot create wakeup pipe
AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': 
Too many open files

difficult to reproduce, since I must leave clementine running for many
days to get this, but it's happened twice before; this was the first
time I kept an xterm open to watch stderr.


Before you ask "why are you using ALSA instead of Pulseaudio?"  I had to ditch 
pulseaudio because it would crash with clementine, and I would have to reboot 
both pulsed and clementine every three days, sometimes more often, and 
clementine wasn't the only program that would get pulsed wedged hard -- also 
happened with Chromium, VLC, totem, and even Audacity.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: clementine 1.3.1+git276-g3485bbe43+dfsg-1
ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13
Uname: Linux 4.13.0-25-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Mar  3 22:21:09 2018
InstallationDate: Installed on 2016-06-05 (636 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: clementine
UpgradeStatus: Upgraded to artful on 2017-10-22 (133 days ago)

** Affects: clementine (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1753195

Title:
  "per-process limit on the number of open file descriptors has been
  reached"

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