Veyon server crashing

[nikolaslibert]

Hi,
when I open the veyon master, I can see the computers screen snapshot for almost a second before it goes unreachable.

The veyon service has the following status:

sudo systemctl status veyon
● veyon.service - Veyon Service
     Loaded: loaded (/lib/systemd/system/veyon.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2021-09-16 15:55:01 -03; 23s ago
       Docs: man:veyon-service(1)
   Main PID: 3542 (veyon-service)
      Tasks: 4 (limit: 2007)
     Memory: 3.8M
     CGroup: /system.slice/veyon.service
             └─3542 /usr/bin/veyon-service

set 16 15:55:01 Info-pc01 systemd[1]: Started Veyon Service.

It looks like the server is not running. If I restart the service, the server runs again, like here:

$ sudo systemctl restart veyon
$ sudo systemctl status veyon
● veyon.service - Veyon Service
     Loaded: loaded (/lib/systemd/system/veyon.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2021-09-16 15:57:58 -03; 2s ago
       Docs: man:veyon-service(1)
   Main PID: 3631 (veyon-service)
      Tasks: 17 (limit: 2007)
     Memory: 31.4M
     CGroup: /system.slice/veyon.service
             ├─3631 /usr/bin/veyon-service
             ├─3635 /usr/bin/veyon-server
             └─3636 /usr/bin/veyon-worker {8e997d84-ebb9-430f-8f72-d45d9821963d}

set 16 15:57:58 Info-pc01 systemd[1]: Stopping Veyon Service...
set 16 15:57:58 Info-pc01 systemd[1]: veyon.service: Succeeded.
set 16 15:57:58 Info-pc01 systemd[1]: Stopped Veyon Service.
set 16 15:57:58 Info-pc01 systemd[1]: Started Veyon Service.

But when I open the veyon master, the server briefly closes itself again.

My log files are here:

cat VeyonFeatureWorker-8e997d84-ebb9-430f-8f72-d45d9821963d.log
2021-09-16T15:12:10.433: [ERR] ServiceDataManager: connection timed out
2021-09-16T15:12:10.433: [ERR] PersistentLogonCredentials: Empty data

sudo cat VeyonService.log
2021-09-16T15:14:08.891: [WARN] LinuxServiceCore: server for session "/org/freedesktop/login1/session/c1" still running - killing now
2021-09-16T15:14:11.929: [WARN] QProcess: Destroyed while process ("/usr/bin/veyon-server") is still running.
2021-09-16T15:14:11.931: [ERR] LinuxSessionFunctions: Could not query session property "State" "Unknown object '/org/freedesktop/login1/session/c1'."

sudo cat VeyonServer.log
2021-09-16T15:12:08.788: [WARN] VariantStream: none or invalid data read
2021-09-16T15:12:08.788: [ERR] PersistentLogonCredentials: Empty data

If you look for the timestamps in the log files, you will see that there isn't any error report after I restarted the service and let it "crash" again (15:57:58).

I'm running everything in Xubuntu 20.04.3 with Veyon 4.5.7.

Thank you for your help,
Nikolas Libert

[tobydox]

Since you're on (X)Ubunto 20.04, I recommend installing the latest test build for Veyon 4.5: https://github.com/veyon/veyon/releases/download/v4.5.7/veyon_4.5.7-56-ubuntu-focal_amd64.deb - it contains many service-related fixes and improvements.

[nikolaslibert]

@tobydox Thanks! With that version everything works fine.