Liquidsoap hanging during shutdown

[AxisNL]

Describe the bug
We're using liquidsoap 1.3.6, as a part of Cast-Control's MediaCP package. It works fine, but we have an issue where incidentally a customer will choose to restart liquidsoap, and it will hang during shutdown. An admin has to log in to the server and do a kill -9. The problem is that we cannot seem to reproduce it. I can restart liquidsoap hundreds of times without a problem.

Funny thing is that a succesful shutdown logs this (grepping for main in liquidsoap.log):

2019/06/20 20:25:36 [main:3] Shutdown started!
2019/06/20 20:25:36 [main:3] Waiting for threads to terminate...
2019/06/20 20:25:36 [clock.wallclock_main:3] Streaming loop stopped.
2019/06/20 20:25:36 [main:3] Threads terminated.
2019/06/20 20:25:36 [main:3] Cleaning downloaded files...
2019/06/20 20:25:36 [main:3] Freeing memory...

And an unsuccesful shutdown logs:

2019/06/20 20:26:51 [main:3] Shutdown started!
2019/06/20 20:26:51 [main:3] Waiting for threads to terminate...
2019/06/20 20:26:51 [clock.wallclock_main:3] Streaming loop stopped.
2019/06/20 20:26:51 [main:3] Threads terminated.

After this it becomes zombie and doesn't do anything anymore.

To Reproduce
Can't reproduce myself. Our customers do thousands of autodj restarts a week, and sometimes this issue pops up.

Expected behavior
I expect liquidsoap to shutdown nice and cleanly when it is asked to do so.

Version details

• OS: CentOS Linux release 7.6.1810 (Core)
• Liquidsoap 1.3.6

Install method
Installed using yum by mediacp (liquidsoap-1.3.6-80.4.x86_64), logs show:

2019/06/20 20:49:03 [main:3] Liquidsoap 1.3.6
2019/06/20 20:49:03 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.3.4 dtools=0.4.1 duppy=0.8.0 cry=0.6.2 mm=0.4.0 xmlplaylist=0.1.4 ogg=0.5.2 vorbis=0.7.1 opus=0.1.2 speex=0.2.1 mad=0.4.5 flac=0.1.4 flac.ogg=0.1.4 dynlink=[distributed with Ocaml] lame=0.3.3 theora=0.3.1 bjack=0.1.5 alsa=0.2.3 samplerate=0.1.4 taglib=0.3.5 magic=0.7.3 inotify=2.3 yojson=1.1.8 soundtouch=0.1.8 ladspa=0.1.5

I hope you guys have an idea what the problem could be.. (known issue I overlooked?)

[smimram]

Without a reproduction case, it is very difficult to answer (and if we were aware of such problems we would already have fixed those :)). The only recent related issue I can think of is #769, but it is related to jack and I suspect that you are not likely to use that?

[smimram]

I am going to close this for now since we really don't have enough information. Feel free to reopen if you have a reproducible test case or at least a track, we'll be glad to help!

[crocket]

Upgrade ocaml-duppy to 0.8.0, and recompile liquidsoap.
A lower version of ocaml-duppy caused the issue.

[smimram]

Thanks @crocket, feel free to reopen if this was another bug.

[crocket]

I found a simple fix for liquidsoap-1.3.7. It may apply to liquidsoap-1.3.6, too.

1. Upgrade ocaml-duppy to 0.8.0
2. Apply the following patch to ocaml-gstreamer-0.3.0 if you use ocaml-gstreamer

diff -ur a/src/gstreamer_stubs.c b/src/gstreamer_stubs.c
--- a/src/gstreamer_stubs.c	2018-09-10 00:43:43.000000000 +0900
+++ b/src/gstreamer_stubs.c	2019-07-26 09:30:52.714156364 +0900
@@ -586,18 +586,30 @@
 
   caml_release_runtime_system();
   g_main_loop_run(loop);
+  g_main_loop_unref(loop);
   caml_acquire_runtime_system();
 
   CAMLreturn(Val_unit);
 }
 
+gboolean gstreamer_loop_quit_helper(gpointer user_data)
+{
+  GMainLoop* loop = user_data;
+  g_main_loop_quit(loop);
+  return FALSE;
+}
+
 CAMLprim value ocaml_gstreamer_loop_quit(value l)
 {
   CAMLparam1(l);
   GMainLoop* loop = Loop_val(l);
+  GSource* idle_source;
   
   caml_release_runtime_system();
-  g_main_loop_quit(loop);
+  idle_source=g_idle_source_new();
+  g_source_set_callback(idle_source, gstreamer_loop_quit_helper, loop, NULL);
+  g_source_attach(idle_source, NULL);
+  g_source_unref(idle_source);
   caml_acquire_runtime_system();
 
   CAMLreturn(Val_unit);

3. Compile liquidsoap-1.3.6 or liquidsoap-1.3.7 against ocaml-duppy-0.8.0 and ocaml-gstreamer-0.3.0

[AxisNL]

I still have liquidsoap (now 1.3.7) dying on me on shutdown. It might have to do something with a fast subsequent restart (which a client perhaps should not do, but can't prevent it).

A grep for main:3 in the logs show the following:

A successful restart:

2020/02/05 22:20:42 [main:3] Shutdown started!
2020/02/05 22:20:42 [main:3] Waiting for threads to terminate...
2020/02/05 22:20:42 [clock.wallclock_main:3] Streaming loop stopped.
2020/02/05 22:20:42 [main:3] Threads terminated.
2020/02/05 22:20:42 [main:3] Cleaning downloaded files...
2020/02/05 22:20:42 [main:3] Freeing memory...
2020/02/05 22:20:43 [main:3] Liquidsoap 1.3.7
2020/02/05 22:20:43 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.4.1 dtools=0.4.1 duppy=0.8.0 cry=0.6.4 mm=0.4.1 ogg=0.5.2 vorbis=0.7.1 mad=0.4.5 flac=0.1.4 flac.ogg=0.1.4 dynlink=[distributed with Ocaml] lame=0.3.3 fdkaac=0.2.1 theora=0.3.1 samplerate=0.1.4 taglib=0.3.6 camomile=1.0.2 faad=0.4.0
2020/02/05 22:20:44 [clock.wallclock_main:3] Streaming loop starts, synchronized with wallclock.

Another succesful restart:

2020/02/08 21:02:00 [main:3] Shutdown started!
2020/02/08 21:02:00 [main:3] Waiting for threads to terminate...
2020/02/08 21:02:01 [clock.wallclock_main:3] Streaming loop stopped.
2020/02/08 21:02:01 [main:3] Threads terminated.
2020/02/08 21:02:01 [main:3] Cleaning downloaded files...
2020/02/08 21:02:01 [main:3] Freeing memory...
2020/02/08 21:02:04 [main:3] Liquidsoap 1.3.7
2020/02/08 21:02:04 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.4.1 dtools=0.4.1 duppy=0.8.0 cry=0.6.4 mm=0.4.1 ogg=0.5.2 vorbis=0.7.1 mad=0.4.5 flac=0.1.4 flac.ogg=0.1.4 dynlink=[distributed with Ocaml] lame=0.3.3 fdkaac=0.2.1 theora=0.3.1 samplerate=0.1.4 taglib=0.3.6 camomile=1.0.2 faad=0.4.0
2020/02/08 21:02:04 [clock.wallclock_main:3] Streaming loop starts, synchronized with wallclock.

And the next one fails. Liquidsoap zombies out and has to be killed manually and is started the next morning:

2020/02/08 21:02:09 [main:3] Shutdown started!
2020/02/08 21:02:09 [main:3] Waiting for threads to terminate...
2020/02/08 21:02:09 [clock.wallclock_main:3] Streaming loop stopped.
2020/02/08 21:02:09 [main:3] Threads terminated.

2020/02/09 11:42:49 [main:3] Liquidsoap 1.3.7
2020/02/09 11:42:49 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.4.1 dtools=0.4.1 duppy=0.8.0 cry=0.6.4 mm=0.4.1 ogg=0.5.2 vorbis=0.7.1 mad=0.4.5 flac=0.1.4 flac.ogg=0.1.4 dynlink=[distributed with Ocaml] lame=0.3.3 fdkaac=0.2.1 theora=0.3.1 samplerate=0.1.4 taglib=0.3.6 camomile=1.0.2 faad=0.4.0
2020/02/09 11:42:50 [clock.wallclock_main:3] Streaming loop starts, synchronized with wallclock.

Any more ideas?

[crocket]

Did you compile liquidsoap against ocaml-duppy-0.8.0 or above?
Did you follow my instructions?

[AxisNL]

Did you compile liquidsoap against ocaml-duppy-0.8.0 or above?
Did you follow my instructions?

Crocket, yes, thank you, I tried so much stuff that I forget what I tried and what I did not try on so many systems :) The above output shows 'duppy=0.8.0' in the compiler flags, so I am pretty sure it's compiled against ocaml-duppy 0.8.0.

[crocket]

Did you also patch ocaml-streamer?

[Jookia]

As part of reproducing #1045 I've found this issue and I think I'm hitting the same bug. on ocaml-duppy master (0207fdffa34d78e64ec8f98c7cdbc11c2bf49e65)

Massive debug dump:

(gdb) r                                                                                                                       
Starting program: /home/liquidsoap/.opam/default/bin/liquidsoap test.liq --debug 
[Thread debugging using libthread_db enabled]                                                                                 
Using host libthread_db library "/usr/lib/libthread_db.so.1".                                                                 
2020/03/09 21:30:09 >>> LOG START                                                                                             
[New Thread 0x7fffee3c4700 (LWP 40543)]                                                                                       
[New Thread 0x7fffedbc3700 (LWP 40544)]                                                                                       
[Detaching after vfork from child process 405452020/03/09 21:30:09 [main:3] Liquidsoap 1.5.0+git@818d67ea                     
]                                                              
2020/03/09 21:30:09 [main:3] Using: bytes=[distributed with OCaml 4.02 or above] pcre=7.4.3 sedlex=2.1 menhirLib=20200211 dtoo
ls=1b1fa5b duppy=0.8.1 cry=0.6.5 mm=0.6.0 ogg=0.6.0 opus=0.1.3 dynlink=[distributed with Ocaml] ffmpeg-avutil=0.5.0 ffmpeg-avc
odec=0.5.0 ffmpeg-av=0.5.0 ffmpeg-avfilter=0.5.0 ffmpeg-swresample=0.5.0 ffmpeg-swscale=0.5.0 ssl=0.5.9 camomile=1.0.2     
2020/03/09 21:30:09 [main:3]                                   
2020/03/09 21:30:09 [main:3] DISCLAIMER: This version of Liquidsoap has been                                                  
2020/03/09 21:30:09 [main:3] compiled from a snapshot of the development code.                                                
2020/03/09 21:30:09 [main:3] As such, it should not be used in production                                                     
2020/03/09 21:30:09 [main:3] unless you know what you are doing!                                                              
2020/03/09 21:30:09 [main:3]                                                                                                  
2020/03/09 21:30:09 [main:3] We are, however, very interested in any feedback           
2020/03/09 21:30:09 [main:3] about our development code and committed to fix                                                  
2020/03/09 21:30:09 [main:3] issues as soon as possible.                                                                      
2020/03/09 21:30:09 [main:3]                                                                                                  
2020/03/09 21:30:09 [main:3] If you are interested in collaborating to              
2020/03/09 21:30:09 [main:3] the development of Liquidsoap, feel free to                                                      
2020/03/09 21:30:09 [main:3] drop us a mail at <savonet-devl@lists.sf.net>          
2020/03/09 21:30:09 [main:3] or to join the slack chat at <http://slack.liquidsoap.info>.                                     
2020/03/09 21:30:09 [main:3]                                   
2020/03/09 21:30:09 [main:3] Please send any bug report or feature request                                                    
2020/03/09 21:30:09 [main:3] at <https://github.com/savonet/liquidsoap/issues>.                                               
2020/03/09 21:30:09 [main:3]                                                                                                  
2020/03/09 21:30:09 [main:3] We hope you enjoy this snapshot build of Liquidsoap!               
2020/03/09 21:30:09 [main:3]                                                                                                  
2020/03/09 21:30:09 [dynamic.loader:3] Could not find dynamic module for lame encoder.           
2020/03/09 21:30:09 [dynamic.loader:3] Could not find dynamic module for fdkaac encoder.                                      
2020/03/09 21:30:09 [frame:3] Using 44100Hz audio, 25Hz video, 44100Hz master.                                      
2020/03/09 21:30:09 [frame:3] Frame size must be a multiple of 1764 ticks = 1764 audio samples = 1 video samples.             
2020/03/09 21:30:09 [frame:3] Targetting 'frame.duration': 0.04s = 1764 audio samples = 1764 ticks.                           
2020/03/09 21:30:09 [frame:3] Frames last 0.04s = 1764 audio samples = 1 video samples = 1764 ticks.    
2020/03/09 21:30:09 [request.dynamic_17310:4] Reloading playlist.                                                             
2020/03/09 21:30:09 [request.dynamic_17310:4] Playlist is a directory.
[New Thread 0x7fffed3c2700 (LWP 40547)]                                                                                       
2020/03/09 21:30:09 [sandbox:3] Sandboxing disabled                                                                           
2020/03/09 21:30:09 [video.converter:3] Couldn't find preferred video converter: gavl.                                        
[New Thread 0x7fffecbc1700 (LWP 40548)] 
[New Thread 0x7fffe7fff700 (LWP 40549)]                                                                             [141/1852]
[New Thread 0x7fffe77fe700 (LWP 40550)]                
[New Thread 0x7fffe6ffd700 (LWP 40551)]                                                                                       
2020/03/09 21:30:09 [audio.converter:3] Using samplerate converter: ffmpeg.
2020/03/09 21:30:09 [threads:4] Created thread "generic queue #1" (1 total).     
2020/03/09 21:30:09 [threads:4] Created thread "generic queue #2" (2 total).                                 
2020/03/09 21:30:09 [threads:4] Created thread "non-blocking queue #1" (3 total).           
2020/03/09 21:30:09 [threads:4] Created thread "non-blocking queue #2" (4 total).                      
2020/03/09 21:30:09 [clock:4] Currently 1 clocks allocated.                                                                   
2020/03/09 21:30:09 [clock.main:4] Starting 1 sources...                                                                      
2020/03/09 21:30:09 [source:4] Source output.icecast_17319 gets up.                                                           
2020/03/09 21:30:09 [source:4] Source mksafe gets up.
2020/03/09 21:30:09 [source:4] Source request.dynamic_17310 gets up.      
2020/03/09 21:30:09 [request.dynamic_17310:4] Content kind is {audio=2;video=0;midi=0}.                         
2020/03/09 21:30:09 [request.dynamic_17310:4] Activations changed: static=[], dynamic=[mksafe:/test(dot)mp3:/test(dot)mp3].
2020/03/09 21:30:09 [source:4] Source safe_blank gets up.  
2020/03/09 21:30:09 [safe_blank:4] Content kind is {audio=2;video=0;midi=0}.                                                  
2020/03/09 21:30:09 [safe_blank:4] Activations changed: static=[], dynamic=[mksafe:/test(dot)mp3:/test(dot)mp3].              
2020/03/09 21:30:09 [mksafe:4] Activations changed: static=[/test(dot)mp3:/test(dot)mp3], dynamic=[].                         
2020/03/09 21:30:09 [/test(dot)mp3:4] Activations changed: static=[/test(dot)mp3], dynamic=[].                                
2020/03/09 21:30:09 [/test(dot)mp3:4] Enabling caching mode: active source.                                                   
2020/03/09 21:30:09 [/test(dot)mp3:3] Connecting mount /test.mp3 for source@localhost...
[New Thread 0x7fffe53f5700 (LWP 40552)]                                                                                       
2020/03/09 21:30:10 [/test(dot)mp3:2] Connection failed: could not connect to host: Connection refused in connect()
2020/03/09 21:30:10 [/test(dot)mp3:3] Will try again in 3.00 sec.                  
2020/03/09 21:30:10 [threads:4] Created thread "clock_main" (1 total).              
2020/03/09 21:30:10 [clock:4] Main phase starts.                                                                              
2020/03/09 21:30:10 [clock.main:3] Streaming loop starts in auto-sync mode          
2020/03/09 21:30:10 [clock.main:3] Delegating synchronisation to CPU clock                                                    
2020/03/09 21:30:10 [mksafe:3] Switch to safe_blank.           
2020/03/09 21:30:10 [safe_blank:4] Activations changed: static=[mksafe:/test(dot)mp3:/test(dot)mp3], dynamic=[mksafe:/test(dot
)mp3:/test(dot)mp3].                                                                                                          
2020/03/09 21:30:10 [decoder:4] Trying method "META" for "/home/liquidsoap/musics/5_2_11.opus"...                             
2020/03/09 21:30:10 [decoder:4] Trying method "WAV" for "/home/liquidsoap/musics/5_2_11.opus"...
2020/03/09 21:30:10 [decoder.wav/aiff:4] Invalid file extension for "/home/liquidsoap/musics/5_2_11.opus"!                    
2020/03/09 21:30:10 [decoder:4] Trying method "AIFF" for "/home/liquidsoap/musics/5_2_11.opus"...
2020/03/09 21:30:10 [decoder.wav/aiff:4] Invalid file extension for "/home/liquidsoap/musics/5_2_11.opus"!                    
2020/03/09 21:30:10 [decoder:4] Trying method "MIDI" for "/home/liquidsoap/musics/5_2_11.opus"...                   
2020/03/09 21:30:10 [decoder:4] Trying method "IMAGE" for "/home/liquidsoap/musics/5_2_11.opus"...                            
2020/03/09 21:30:10 [decoder:4] Trying method "FFMPEG" for "/home/liquidsoap/musics/5_2_11.opus"...                           
2020/03/09 21:30:10 [decoder.ffmpeg:4] Invalid file extension for "/home/liquidsoap/musics/5_2_11.opus"!
2020/03/09 21:30:10 [decoder:4] Trying method "OGG" for "/home/liquidsoap/musics/5_2_11.opus"...                              
^C2020/03/09 21:30:10 [main:3] Shutdown started!
2020/03/09 21:30:10 [main:3] Waiting for main threads to terminate...                                                         
2020/03/09 21:30:10 [threads:4] Waiting for thread clock_main to shutdown                                                     
2020/03/09 21:30:10 [/test(dot)mp3:4] Activations changed: static=[], dynamic=[].                                             
2020/03/09 21:30:10 [source:4] Source /test(dot)mp3 gets down.
2020/03/09 21:30:10 [mksafe:4] Activations changed: static=[], dynamic=[].  
2020/03/09 21:30:10 [source:4] Source mksafe gets down.
2020/03/09 21:30:10 [request.dynamic_17310:4] Activations changed: static=[], dynamic=[].                                     
2020/03/09 21:30:10 [source:4] Source request.dynamic_17310 gets down.     
2020/03/09 21:30:10 [request.dynamic_17310:4] Waiting for feeding task to stop...
2020/03/09 21:30:10 [decoder.ogg:4] File "/home/liquidsoap/musics/5_2_11.opus" recognized as audio=2 video=0.
2020/03/09 21:30:10 [decoder:3] Method "OGG" accepted "/home/liquidsoap/musics/5_2_11.opus".
2020/03/09 21:30:10 [decoder.id3v2:4] Invalid file extension for "/home/liquidsoap/musics/5_2_11.opus"!
2020/03/09 21:30:10 [request.dynamic_17310:4] Remaining: 0.0s, queued: 0.0s, adding: 30.0s (RID 0)                            
[Thread 0x7fffe53f5700 (LWP 40552) exited]                                                                                    
[Thread 0x7fffecbc1700 (LWP 40548) exited]                                                                                    
[Thread 0x7fffed3c2700 (LWP 40547) exited]           
2020/03/09 21:30:10 [request.dynamic_17310:4] Cleaning up request queue...
2020/03/09 21:30:10 [safe_blank:4] Activations changed: static=[mksafe:/test(dot)mp3:/test(dot)mp3], dynamic=[].
2020/03/09 21:30:10 [safe_blank:4] Activations changed: static=[], dynamic=[].                                             
2020/03/09 21:30:10 [source:4] Source safe_blank gets down.
2020/03/09 21:30:10 [clock.main:3] Streaming loop stopped.                                                                    
2020/03/09 21:30:10 [threads:4] Thread "clock_main" terminated (0 remaining).                                                 
2020/03/09 21:30:10 [main:3] Threads terminated.                                                                              
2020/03/09 21:30:10 [threads:3] Shutting down scheduler...                                                                    
2020/03/09 21:30:10 [threads:3] Scheduler shut down.                                                                          
2020/03/09 21:30:10 [threads:3] Waiting for queue threads to terminate...               
2020/03/09 21:30:10 [threads:4] Waiting for thread generic queue #1 to shutdown                                               
2020/03/09 21:30:10 [threads:4] Thread "generic queue #2" terminated (3 remaining).                                
2020/03/09 21:30:10 [threads:4] Thread "generic queue #1" terminated (2 remaining).
2020/03/09 21:30:10 [threads:4] Waiting for thread non-blocking queue #1 to shutdown
2020/03/09 21:30:10 [threads:4] Thread "non-blocking queue #1" terminated (1 remaining).                                      
2020/03/09 21:30:10 [threads:4] Waiting for thread non-blocking queue #2 to shutdown
[Thread 0x7fffe7fff700 (LWP 40549) exited]                                                                                    
^Z                                                             
Thread 1 "liquidsoap" received signal SIGTSTP, Stopped (user).                                                                
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) info threads
  Id   Target Id                                      Frame 
* 1    Thread 0x7fffef5a0080 (LWP 40542) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  2    Thread 0x7fffee3c4700 (LWP 40543) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  3    Thread 0x7fffedbc3700 (LWP 40544) "liquidsoap" 0x00007ffff5c5cf0b in select () from /usr/lib/libc.so.6
  7    Thread 0x7fffe77fe700 (LWP 40550) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  8    Thread 0x7fffe6ffd700 (LWP 40551) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
(gdb) thread 3
[Switching to thread 3 (Thread 0x7fffedbc3700 (LWP 40544))]
#0  0x00007ffff5c5cf0b in select () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff5c5cf0b in select () from /usr/lib/libc.so.6
#1  0x0000555555c9d6e9 in caml_thread_tick ()
#2  0x00007ffff5e8246f in start_thread () from /usr/lib/libpthread.so.0
#3  0x00007ffff5c653d3 in clone () from /usr/lib/libc.so.6
(gdb) frame 1
#1  0x0000555555c9d6e9 in caml_thread_tick ()
(gdb) disas
Dump of assembler code for function caml_thread_tick:
   0x0000555555c9d680 <+0>:     push   %rbp
   0x0000555555c9d681 <+1>:     push   %rbx
   0x0000555555c9d682 <+2>:     sub    $0xa8,%rsp
   0x0000555555c9d689 <+9>:     mov    %fs:0x28,%rax
   0x0000555555c9d692 <+18>:    mov    %rax,0x98(%rsp)
   0x0000555555c9d69a <+26>:    xor    %eax,%eax
   0x0000555555c9d69c <+28>:    lea    0x10(%rsp),%rbp
   0x0000555555c9d6a1 <+33>:    mov    %rbp,%rdi
   0x0000555555c9d6a4 <+36>:    callq  0x55555591ae10 <sigfillset@plt>
   0x0000555555c9d6a9 <+41>:    xor    %edx,%edx
   0x0000555555c9d6ab <+43>:    mov    %rbp,%rsi
   0x0000555555c9d6ae <+46>:    xor    %edi,%edi
   0x0000555555c9d6b0 <+48>:    callq  0x55555591bd80 <pthread_sigmask@plt>
   0x0000555555c9d6b5 <+53>:    mov    0x3f28d5(%rip),%eax        # 0x55555608ff90 <caml_tick_thread_stop>
   0x0000555555c9d6bb <+59>:    test   %eax,%eax
   0x0000555555c9d6bd <+61>:    jne    0x555555c9d6fd <caml_thread_tick+125>
   0x0000555555c9d6bf <+63>:    mov    %rsp,%rbx
   0x0000555555c9d6c2 <+66>:    nopw   0x0(%rax,%rax,1)
   0x0000555555c9d6c8 <+72>:    mov    %rbx,%r8
   0x0000555555c9d6cb <+75>:    xor    %ecx,%ecx
   0x0000555555c9d6cd <+77>:    xor    %edx,%edx
   0x0000555555c9d6cf <+79>:    xor    %esi,%esi
   0x0000555555c9d6d1 <+81>:    xor    %edi,%edi
   0x0000555555c9d6d3 <+83>:    movq   $0x0,(%rsp)
   0x0000555555c9d6db <+91>:    movq   $0xc350,0x8(%rsp)
   0x0000555555c9d6e4 <+100>:   callq  0x55555591a140 <select@plt>
=> 0x0000555555c9d6e9 <+105>:   mov    $0x1a,%edi
   0x0000555555c9d6ee <+110>:   callq  0x555555ca7420 <caml_record_signal>
   0x0000555555c9d6f3 <+115>:   mov    0x3f2897(%rip),%eax        # 0x55555608ff90 <caml_tick_thread_stop>
   0x0000555555c9d6f9 <+121>:   test   %eax,%eax
   0x0000555555c9d6fb <+123>:   je     0x555555c9d6c8 <caml_thread_tick+72>
   0x0000555555c9d6fd <+125>:   mov    0x98(%rsp),%rax
   0x0000555555c9d705 <+133>:   xor    %fs:0x28,%rax
   0x0000555555c9d70e <+142>:   jne    0x555555c9d71c <caml_thread_tick+156>
   0x0000555555c9d710 <+144>:   add    $0xa8,%rsp
   0x0000555555c9d717 <+151>:   xor    %eax,%eax
   0x0000555555c9d719 <+153>:   pop    %rbx
   0x0000555555c9d71a <+154>:   pop    %rbp
   0x0000555555c9d71b <+155>:   retq   
   0x0000555555c9d71c <+156>:   callq  0x55555591a660 <__stack_chk_fail@plt>

It doesn't look like it really wants to respond to SIGTERM:

(gdb) signal 15
Note:
  Thread 1 previously stopped with signal SIGTSTP, Stopped (user).
Continuing thread 3 (the current thread) with specified signal will
still deliver the signals noted above to their respective threads.
Continue anyway? (y or n) y
Continuing with signal SIGTERM.

Thread 2 "liquidsoap" received signal SIGTSTP, Stopped (user).
[Switching to Thread 0x7fffee3c4700 (LWP 40543)]
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) c
Continuing.

Thread 8 "liquidsoap" received signal SIGTSTP, Stopped (user).
[Switching to Thread 0x7fffe6ffd700 (LWP 40551)]
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) c
Continuing.

Thread 7 "liquidsoap" received signal SIGTSTP, Stopped (user).
[Switching to Thread 0x7fffe77fe700 (LWP 40550)]
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) c
Continuing.

Thread 3 "liquidsoap" received signal SIGTSTP, Stopped (user).
[Switching to Thread 0x7fffedbc3700 (LWP 40544)]
0x00007ffff5c5cf0b in select () from /usr/lib/libc.so.6
(gdb) c
Continuing.

Thread 1 "liquidsoap" received signal SIGTSTP, Stopped (user).
[Switching to Thread 0x7fffef5a0080 (LWP 40542)]
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) c
(gdb) c
Continuing.
^C^Z
Thread 1 "liquidsoap" received signal SIGTSTP, Stopped (user).
0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) info threads
  Id   Target Id                                      Frame 
* 1    Thread 0x7fffef5a0080 (LWP 40542) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  2    Thread 0x7fffee3c4700 (LWP 40543) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  3    Thread 0x7fffedbc3700 (LWP 40544) "liquidsoap" 0x00007ffff5c5cf0b in select () from /usr/lib/libc.so.6
  7    Thread 0x7fffe77fe700 (LWP 40550) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
  8    Thread 0x7fffe6ffd700 (LWP 40551) "liquidsoap" 0x00007ffff5e88cf5 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /usr/lib/libpthread.so.0
(gdb) 

Linux confirms this is a signal issue:

[liquidsoap@liquidsoap ocaml-duppy]$ grep '^Sig' /proc/40542/task/40544/status 
SigQ:   19/15413
SigPnd: 0000000000004000
SigBlk: fffffffe7ffbfeff
SigIgn: 0000000000001000
SigCgt: 0000000182004602

[AxisNL]

Did you also patch ocaml-streamer?

I'm still getting this confirmed by our control panel's technician, I have too little knowledge about ocaml. I see Jookia is seeing issues as well, I wonder if that will help the case.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue was closed for lack of activity. If you believe that it is still relevant, please confirm that it applies to the latest released version of liquidsoap and re-open the ticket. Thanks!