neko: Can't log back in if all users disconnect and audio device doesn't exist

Hi, Since v2.8, I can’t seem to be able to log back in after one (or multiple) users connect, then all log out. The login prompt times out. A restart of the server is needed for it to work again.

For example: user1 logs in -> user1 logs out => timeout when trying to log back in user1 logs in -> user2 logs in -> user2 logs out => can still connect as long as user1 is connected user1 logs in -> user2 logs in -> user2 logs out -> user3 logs in -> user1 logs out => can still connect as long as user3 is connected user1 logs in -> user2 logs in -> user 2 logs out -> user1 logs out => timeout when trying to log in

Everything was working fine with v2.7 using the exact same config.

Logs from 2.8, connecting/disconnecting with one user:

 nurdism/m1k1o server v2.8.0
9:18AM INF preflight complete config=/etc/neko/neko.yaml debug=false logging=false
9:18AM INF starting neko server service=neko
9:18AM INF setting initial screen size module=desktop screen_size=1280x720@30
9:18AM INF using TCP MUX listener=0.0.0.0:60000 module=webrtc
9:18AM INF using UDP MUX module=webrtc port=60000
9:18AM INF webrtc starting ephemeral_port_range=59000-59100 ice_lite=true ice_servers="[{URLs:[stun:stun.l.google.com:19302] Username: Credential:<nil> CredentialType:password}]" module=webrtc nat_ips=[PublicIP]
9:18AM INF Listening TCP on 0.0.0.0:60000 module=webrtc submodule=pion subsystem=ice-tcp
9:18AM WRN http listening on neko.domain:8080 module=http
9:18AM INF neko ready service=neko
9:18AM INF creating pipeline codec=opus module=capture src="pulsesrc device=audio_output.monitor ! audio/x-raw,channels=2 ! audioconvert ! opusenc inband-fec=true bitrate=320000 ! appsink name=appsinkaudio" submodule=stream-sink video_id=audio
9:18AM INF first listener, starting module=capture submodule=stream-sink video_id=audio
9:18AM INF creating pipeline codec=vp8 module=capture src="ximagesrc display-name=:0.0 show-pointer=true use-damage=false ! video/x-raw,framerate=30/1 ! videoconvert ! queue !  vp8enc target-bitrate=1996800 cpu-used=4 end-usage=cbr threads=4 deadline=1 undershoot=95 buffer-size=12288 buffer-initial-size=6144 buffer-optimal-size=9216 keyframe-max-dist=25 min-quantizer=4 max-quantizer=20  ! appsink name=appsinkvideo" submodule=stream-sink video_id=video
9:18AM INF first listener, starting module=capture submodule=stream-sink video_id=video
9:18AM INF signaling state changed to have-local-offer module=webrtc submodule=pion subsystem=pc
9:18AM WRN negotiation is needed module=webrtc
9:18AM ERR creating offer failed error="InvalidModificationError: invalid proposed signaling state transition: have-local-offer->SetLocal(offer)->have-local-offer" module=webrtc
9:18AM INF signal update - LocalCandidate id=Y-mFZcBPkcZTXi55U8F2XBWX4k4XKPWB module=session
9:18AM INF signal update - LocalCandidate id=Y-mFZcBPkcZTXi55U8F2XBWX4k4XKPWB module=session
9:18AM INF sent all ICECandidates module=webrtc
9:18AM INF signal update - RemoteAnswer id=Y-mFZcBPkcZTXi55U8F2XBWX4k4XKPWB module=session
9:18AM INF signaling state changed to stable module=webrtc submodule=pion subsystem=pc
9:18AM INF Setting new connection state: Checking module=webrtc submodule=pion subsystem=ice
9:18AM INF ICE connection state changed: checking module=webrtc submodule=pion subsystem=pc
9:18AM INF connection state has changed connection_state=checking module=webrtc
9:18AM INF Setting new connection state: Connected module=webrtc submodule=pion subsystem=ice
9:18AM INF ICE connection state changed: connected module=webrtc submodule=pion subsystem=pc
9:18AM INF connection state has changed connection_state=connected module=webrtc
9:18AM INF peer connection state changed: connected module=webrtc submodule=pion subsystem=pc
9:18AM INF peer connected id=Y-mFZcBPkcZTXi55U8F2XBWX4k4XKPWB module=webrtc
9:18AM WRN read message error error="websocket: close 1005 (no status)" module=websocket
9:18AM WRN Failed to accept RTP stream is already closed module=webrtc submodule=pion subsystem=pc
9:18AM WRN Failed to read from candidate tcp4 host [PublicIP]:60000: io: read/write on closed pipe module=webrtc submodule=pion subsystem=ice
9:18AM WRN Failed to accept RTCP stream is already closed module=webrtc submodule=pion subsystem=pc
9:18AM INF Setting new connection state: Closed module=webrtc submodule=pion subsystem=ice
9:18AM INF peer connection state changed: closed module=webrtc submodule=pion subsystem=pc
9:18AM INF ICE connection state changed: closed module=webrtc submodule=pion subsystem=pc
9:18AM INF connection state has changed connection_state=closed module=webrtc
9:18AM INF peer closed id=Y-mFZcBPkcZTXi55U8F2XBWX4k4XKPWB module=webrtc

Same thing but on 2.7:

 nurdism/m1k1o server v2.7.0 dev
9:14AM INF preflight complete config=/etc/neko/neko.yaml debug=false logging=false
9:14AM INF starting neko server service=neko
9:14AM INF setting initial screen size module=desktop screen_size=1280x720@30
9:14AM INF using TCP MUX listener=0.0.0.0:60000 module=webrtc
9:14AM WRN UDPMuxDefault should not listening on unspecified address, use NewMultiUDPMuxFromPort instead module=webrtc submodule=pion subsystem=ice-udp
9:14AM INF using UDP MUX listener=0.0.0.0:60000 module=webrtc
9:14AM INF webrtc starting ephemeral_port_range=59000-59100 ice_lite=true ice_servers="[{URLs:[stun:stun.l.google.com:19302] Username: Credential:<nil> CredentialType:password}]" module=webrtc nat_ips=[PublicIP]
9:14AM INF Listening TCP on 0.0.0.0:60000 module=webrtc submodule=pion subsystem=ice-tcp
9:14AM WRN http listening on neko.domain:8080 module=http
9:14AM INF neko ready service=neko
9:15AM INF creating pipeline codec=opus module=capture src="pulsesrc device=auto_null.monitor ! audio/x-raw,channels=2 ! audioconvert ! opusenc inband-fec=true bitrate=320000 ! appsink name=appsink" submodule=stream-sink video_id=audio
9:15AM INF first listener, starting module=capture submodule=stream-sink video_id=audio
9:15AM INF creating pipeline codec=vp8 module=capture src="ximagesrc display-name=:0.0 show-pointer=true use-damage=false ! video/x-raw,framerate=30/1 ! videoconvert ! queue !  vp8enc target-bitrate=1996800 cpu-used=4 end-usage=cbr threads=4 deadline=1 undershoot=95 buffer-size=12288 buffer-initial-size=6144 buffer-optimal-size=9216 keyframe-max-dist=25 min-quantizer=4 max-quantizer=20  ! appsink name=appsink" submodule=stream-sink video_id=video
9:15AM INF first listener, starting module=capture submodule=stream-sink video_id=video
9:15AM INF signaling state changed to have-local-offer module=webrtc submodule=pion subsystem=pc
9:15AM INF sent all ICECandidates module=webrtc
9:15AM INF signal update - RemoteAnswer id=dyUB-wXo35CaQmE1BknxYpFCWAYvvYho module=session
9:15AM INF signaling state changed to stable module=webrtc submodule=pion subsystem=pc
9:15AM INF Setting new connection state: Checking module=webrtc submodule=pion subsystem=ice
9:15AM INF ICE connection state changed: checking module=webrtc submodule=pion subsystem=pc
9:15AM INF connection state has changed connection_state=checking module=webrtc
9:15AM INF Setting new connection state: Connected module=webrtc submodule=pion subsystem=ice
9:15AM INF ICE connection state changed: connected module=webrtc submodule=pion subsystem=pc
9:15AM INF connection state has changed connection_state=connected module=webrtc
9:15AM INF peer connection state changed: connected module=webrtc submodule=pion subsystem=pc
9:15AM INF peer connected id=dyUB-wXo35CaQmE1BknxYpFCWAYvvYho module=webrtc
9:15AM WRN read message error error="websocket: close 1005 (no status)" module=websocket
9:15AM WRN Failed to accept RTP stream is already closed module=webrtc submodule=pion subsystem=pc
9:15AM INF Setting new connection state: Closed module=webrtc submodule=pion subsystem=ice
9:15AM INF peer connection state changed: closed module=webrtc submodule=pion subsystem=pc
9:15AM WRN Failed to accept RTCP stream is already closed module=webrtc submodule=pion subsystem=pc
9:15AM INF ICE connection state changed: closed module=webrtc submodule=pion subsystem=pc
9:15AM INF connection state has changed connection_state=closed module=webrtc
9:15AM INF peer closed id=dyUB-wXo35CaQmE1BknxYpFCWAYvvYho module=webrtc
9:15AM INF destroying pipeline module=capture submodule=stream-sink video_id=audio
9:15AM INF last listener, stopping module=capture submodule=stream-sink video_id=audio
9:15AM INF destroying pipeline module=capture submodule=stream-sink video_id=video
9:15AM INF last listener, stopping module=capture submodule=stream-sink video_id=video
9:15AM INF destroying session module=session session_id=dyUB-wXo35CaQmE1BknxYpFCWAYvvYho

Seems like the only difference is Failed to read from candidate tcp4 host [PublicIP]:60000: io: read/write on closed pipe module=webrtc submodule=pion subsystem=ice, maybe that’s related?

My config file:

screen: "1280x720@30"
max_fps: 30
video_codec: "vp8"
video_bitrate: 2000
hwenc: "none"
audio_codec: "opus"
audio_bitrate: 256

password: "password"
password_admin: "admin"

bind: "neko.domain:8080"
udpmux: "60000"
tcpmux: "60000"
nat1to1: "[PublicIP]"
icelite: true

display: ":0.0"
static: "/usr/share/neko/dist"

The same thing happens no matter if I use the udpmux or epr setting. I am running Neko directly on an Alpine v3.17 VM, without docker, with nginx as reverse proxy.