[pulseaudio-tickets] [Bug 97874] New: PulseAudio hangs after the first stream is ended

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97874

            Bug ID: 97874
           Summary: PulseAudio hangs after the first stream is ended
           Product: PulseAudio
           Version: unspecified
          Hardware: ARM
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: daemon
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: amigo.elite at gmail.com
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

Created attachment 126661
  --> https://bugs.freedesktop.org/attachment.cgi?id=126661&action=edit
strace -Tttyy -s 111111 -o pa.strace -f -p `pidof pulseaudio`

Description:

PulseAudio hangs after hangs after the first input stream has ended.

Reproducibility: 95%

Steps to reproduce:

1. Setup new pulseaudio in system mode
2. Exec following:
# LANG=C PULSE_LOG_TIME=1 PULSE_LOG=4 paplay /usr/share/sounds/alsa/Noise.wav
3. Repeat step 2

Actual result:

# LANG=C PULSE_LOG_TIME=1 PULSE_LOG=4 paplay /usr/share/sounds/alsa/Noise.wav
(   0.000|   0.000) Parsing configuration file '/etc/pulse/client.conf'
(   0.002|   0.002) Using shared memory pool with 1024 slots of size 64.0 KiB
each, total size is 64.0 MiB, maximum usable slot size is 65496
(   0.003|   0.001) Not doing autospawn since we are root.
(   0.004|   0.000) Trying to connect to /run/user/0/pulse/native...
(   0.005|   0.000) connect(): No such file or directory (2)
(   0.005|   0.000) Trying to connect to /var/run/pulse/native...
(   0.007|   0.002) SHM possible: yes
(   0.010|   0.002) Protocol version: remote 30, local 30
(   0.011|   0.000) Negotiated SHM: no
(  30.057|  30.045) Failed to drain stream: Timeout

Expected result:

# LANG=C PULSE_LOG_TIME=1 PULSE_LOG=4 paplay /usr/share/sounds/alsa/Noise.wav
(   0.000|   0.000) Parsing configuration file '/etc/pulse/client.conf'
(   0.002|   0.002) Using shared memory pool with 1024 slots of size 64.0 KiB
each, total size is 64.0 MiB, maximum usable slot size is 65496
(   0.003|   0.001) Not doing autospawn since we are root.
(   0.004|   0.000) Trying to connect to /run/user/0/pulse/native...
(   0.004|   0.000) connect(): No such file or directory (2)
(   0.005|   0.000) Trying to connect to /var/run/pulse/native...
(   0.006|   0.001) SHM possible: yes
(   0.009|   0.002) Protocol version: remote 30, local 30
(   0.009|   0.000) Negotiated SHM: no

Additional info:

Sometimes PA accepts second stream without any timeouts but I can't find any
particular conditions in which it was happening.
While PA is in a hang I can still use HTTP/CLI protocols (pactl, Web UI).

Please note that PA system mode is because because I want to use my RPi device
as a network media player.

I'm using Fedora 23 on RPi 2 and here are some details:

# cat /etc/fedora-release 
Fedora release 23 (Twenty Three)

# cat /proc/version 
Linux version 4.1.16-v7+ (dc4 at dc4-XPS13-9333) (gcc version 4.8.3 20140303
(prerelease) (crosstool-NG linaro-1.13.1+bzr2650 - Linaro GCC 2014.03) ) #833
SMP Wed Jan 27 14:32:22 GMT 2016

# rpm -qa | grep pulse
pulseaudio-libs-7.1-1.fc23.1.armv7hl
pulseaudio-7.1-1.fc23.1.armv7hl
pulseaudio-utils-7.1-1.fc23.1.armv7hl

# gdb -p `pidof pulseaudio` -ex 'thr a a bt f' #while PA in hang
[..]
#0  0x767f1d54 in ppoll () from /lib/libc.so.6
No symbol table info available.
#1  0x76ef4c94 in pa_rtpoll_run () from /lib/libpulsecore-7.1.so
No symbol table info available.
#2  0x71e9228c in thread_func () from
/usr/lib/pulse-7.1/modules/libalsa-util.so
No symbol table info available.
#3  0x76d20940 in internal_thread_func () from
/usr/lib/pulseaudio/libpulsecommon-7.1.so
No symbol table info available.
#4  0x7694f0fc in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#5  0x767fe370 in ?? () from /lib/libc.so.6
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x76232000 (LWP 3064)):
#0  0x767f1d54 in ppoll () from /lib/libc.so.6
No symbol table info available.
#1  0x76e8d3f0 in pa_mainloop_poll () from /lib/libpulse.so.0
No symbol table info available.
#2  0x76e8da90 in pa_mainloop_iterate () from /lib/libpulse.so.0
No symbol table info available.
#3  0x76e8db68 in pa_mainloop_run () from /lib/libpulse.so.0
No symbol table info available.
#4  0x54b197bc in main ()
No symbol table info available.

I've also attached a complete output of strace and all related configs.

Thanks for any suggestions!

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