Port is no longer open and it is not responing requests, last logs say:
Aug 09 01:17:32 scb1001 pdfrender[3088]: Parent pid 3137, child pid 3138 Aug 09 01:17:32 scb1001 pdfrender[3088]: Parent is shutting down, bye... Aug 09 01:17:33 scb1001 pdfrender[3088]: 2017-08-09 01:17:33,087 New connection received: SocketConnection(/home/pdfrender/.xpra/scb1001-403) Aug 09 01:17:36 scb1001 pdfrender[3088]: 2017-08-09 01:17:36,506 Python/GObject Linux client version 0.14.10 connected from 'scb1001' as 'pdfrender' Aug 09 01:17:36 scb1001 pdfrender[3088]: 2017-08-09 01:17:36,506 windows/pixels forwarding is disabled for this client Aug 09 01:17:36 scb1001 pdfrender[3088]: 2017-08-09 01:17:36,705 Shutting down in response to request Aug 09 01:17:37 scb1001 pdfrender[3088]: 2017-08-09 01:17:37,733 Disconnecting client Protocol(SocketConnection(/home/pdfrender/.xpra/scb1001-403)): server shutdown Aug 09 01:17:37 scb1001 pdfrender[3088]: 2017-08-09 01:17:37,752 xpra client disconnected. Aug 09 01:17:37 scb1001 pdfrender[3088]: server requested disconnect: server shutdown Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,035 New connection received: SocketConnection(/home/pdfrender/.xpra/scb1001-403) Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,077 Connection lost Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,304 New connection received: SocketConnection(/home/pdfrender/.xpra/scb1001-403) Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,305 Connection lost Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,527 xpra is terminating. Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,710 removing socket /home/pdfrender/.xpra/scb1001-403 Aug 09 01:17:38 scb1001 pdfrender[3088]: 2017-08-09 01:17:38,711 killing xvfb with pid 3096 Aug 09 01:17:38 scb1001 pdfrender[3088]: xpra at :403 has exited. Aug 09 01:17:40 scb1001 pdfrender[3088]: Xpra server pid 3089, xpra client pid 3136, jail 3137 Aug 09 01:17:41 scb1001 pdfrender[3088]: (EE) Server terminated successfully (0). Closing log file. Aug 09 01:17:53 scb1001 systemd[1]: pdfrender.service holdoff time over, scheduling restart. Aug 09 01:17:53 scb1001 systemd[1]: Stopping "pdfrender service"... Aug 09 01:17:53 scb1001 systemd[1]: Starting "pdfrender service"... Aug 09 01:17:53 scb1001 systemd[1]: Started "pdfrender service". Aug 09 01:17:53 scb1001 pdfrender[8986]: Reading profile /etc/firejail/pdfrender.profile Aug 09 01:17:53 scb1001 pdfrender[8986]: Reading profile /etc/firejail/default.profile Aug 09 01:17:53 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-common.inc Aug 09 01:17:53 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-programs.inc Aug 09 01:17:53 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-passwdmgr.inc Aug 09 01:17:53 scb1001 pdfrender[8986]: Warning: a protocol list is present, the new list "unix,inet,inet6" will not be installed Aug 09 01:17:53 scb1001 pdfrender[8986]: X.Org X Server 1.16.4 Aug 09 01:17:53 scb1001 pdfrender[8986]: Release Date: 2014-12-20 Aug 09 01:17:53 scb1001 pdfrender[8986]: X Protocol Version 11, Revision 0 Aug 09 01:17:53 scb1001 pdfrender[8986]: Build Operating System: Linux 4.9.0-3-amd64 x86_64 Debian Aug 09 01:17:53 scb1001 pdfrender[8986]: Current Operating System: Linux scb1001 4.9.0-0.bpo.3-amd64 #1 SMP Debian 4.9.25-1~bpo8+3 (2017-06-15) x86_64 Aug 09 01:17:53 scb1001 pdfrender[8986]: Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.9.0-0.bpo.3-amd64 root=UUID=8f324991-196d-4dda-b045-cd1956d3461d ro console=ttyS1,115200n8 elevator=deadline Aug 09 01:17:53 scb1001 pdfrender[8986]: Build Date: 17 July 2017 01:40:19PM Aug 09 01:17:53 scb1001 pdfrender[8986]: xorg-server 2:1.16.4-1+deb8u1+b1 (http://www.debian.org/support) Aug 09 01:17:53 scb1001 pdfrender[8986]: Current version of pixman: 0.32.6 Aug 09 01:17:53 scb1001 pdfrender[8986]: Before reporting problems, check http://wiki.x.org Aug 09 01:17:53 scb1001 pdfrender[8986]: to make sure that you have the latest version. Aug 09 01:17:53 scb1001 pdfrender[8986]: Markers: (--) probed, (**) from config file, (==) default setting, Aug 09 01:17:53 scb1001 pdfrender[8986]: (++) from command line, (!!) notice, (II) informational, Aug 09 01:17:53 scb1001 pdfrender[8986]: (WW) warning, (EE) error, (NI) not implemented, (??) unknown. Aug 09 01:17:53 scb1001 pdfrender[8986]: (++) Log file: "/home/pdfrender/.xpra/Xorg.:823.log", Time: Wed Aug 9 01:17:53 2017 Aug 09 01:17:53 scb1001 pdfrender[8986]: (++) Using config file: "/etc/xpra/xorg.conf" Aug 09 01:17:53 scb1001 pdfrender[8986]: (==) Using system config directory "/usr/share/X11/xorg.conf.d" Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,187 server uuid is 9a6b5acf62e84577b2799bf75ae30a83 Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,264 cannot load dbus helper: No module named dbus Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,271 xpra server version 0.14.10 (r7983) Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,272 running with pid 8987 Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,287 xpra is ready. Aug 09 01:17:54 scb1001 pdfrender[8986]: Reading profile /etc/firejail/pdfrender.profile Aug 09 01:17:54 scb1001 pdfrender[8986]: Reading profile /etc/firejail/default.profile Aug 09 01:17:54 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-common.inc Aug 09 01:17:54 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-programs.inc Aug 09 01:17:54 scb1001 pdfrender[8986]: Reading profile /etc/firejail/disable-passwdmgr.inc Aug 09 01:17:54 scb1001 pdfrender[8986]: Warning: a protocol list is present, the new list "unix,inet,inet6" will not be installed Aug 09 01:17:54 scb1001 pdfrender[8986]: [199B blob data] Aug 09 01:17:54 scb1001 pdfrender[8986]: warnings.warn(str(e), _gtk.Warning) Aug 09 01:17:54 scb1001 pdfrender[8986]: /usr/lib/python2.7/dist-packages/xpra/client/gtk2/__init__.py:7: GtkWarning: IA__gdk_screen_get_root_window: assertion 'GDK_IS_SCREEN (screen)' failed Aug 09 01:17:54 scb1001 pdfrender[8986]: from xpra.x11.gtk_x11 import gdk_display_source Aug 09 01:17:54 scb1001 pdfrender[8986]: 2017-08-09 01:17:54,988 failed load posix keyboard bindings: display is not set! Aug 09 01:17:55 scb1001 pdfrender[8986]: xpra main error: Aug 09 01:17:55 scb1001 pdfrender[8986]: Traceback (most recent call last): Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/scripts/main.py", line 103, in main Aug 09 01:17:55 scb1001 pdfrender[8986]: return run_mode(script_file, err, options, args, mode, defaults) Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/scripts/main.py", line 761, in run_mode Aug 09 01:17:55 scb1001 pdfrender[8986]: return run_client(error_cb, options, args, mode) Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/scripts/main.py", line 1111, in run_client Aug 09 01:17:55 scb1001 pdfrender[8986]: app = make_client(error_cb, opts) Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/scripts/main.py", line 1174, in make_client Aug 09 01:17:55 scb1001 pdfrender[8986]: toolkit_module = __import__(client_module, globals(), locals(), ['XpraClient']) Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/client/gtk2/client.py", line 37, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: from xpra.client.gtk2.border_client_window import BorderClientWindow Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/client/gtk2/border_client_window.py", line 10, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: from xpra.client.gtk2.client_window import ClientWindow Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/client/gtk2/client_window.py", line 9, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: from xpra.client.gtk2.gtk2_window_base import GTK2WindowBase Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/client/gtk2/gtk2_window_base.py", line 15, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: from xpra.client.gtk_base.gtk_client_window_base import GTKClientWindowBase, HAS_X11_BINDINGS Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/client/gtk_base/gtk_client_window_base.py", line 33, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: from xpra.x11.gtk_x11.prop import prop_get, prop_set Aug 09 01:17:55 scb1001 pdfrender[8986]: File "/usr/lib/python2.7/dist-packages/xpra/x11/gtk_x11/prop.py", line 25, in <module> Aug 09 01:17:55 scb1001 pdfrender[8986]: X11Window = X11WindowBindings() Aug 09 01:17:55 scb1001 pdfrender[8986]: File "xpra/x11/bindings/core_bindings.pyx", line 57, in xpra.x11.bindings.core_bindings.X11CoreBindings.__cinit__ (xpra/x11/bindings/core_bindings.c:1038) Aug 09 01:17:55 scb1001 pdfrender[8986]: AssertionError: display is not set!