hi there,

I tried to setup xpra with printing feature. Unfortunately, I met an error with 
the GTK2 client. The xpra server is running with CUPS, and the xpra client and 
the xapp (libreoffice) are running on remote hosts.

The printers are shared as awaited, and visible from xapp host. No error, no 
message from the Xapp when printing, but xpra server and xpra client raise 
errors in their respective logs.

the error stack from xpra server:
parsed printer options: {'sha1': 'c3576dac636aa5936be2265728db719be87b74c9', 
'printer': 'Xerox_Phaser_3250', 'options': {'time-at-processing': '1476885259', 
'time-at-creation': '1476885259', 'job-originating-host-name': '172.19.0.3', 
'PageSize': 'A4', 'job-uuid': 'urn:uuid:8969ba04-18ed-3bf4-5b5f-6d4619a262de'}, 
'copies': '1', 'title': 'Untitled1'}
'Untitled1' sent to X11ServerSource(1 : Protocol(tcp socket: 172.19.0.2:10000
$> xpra attach --opengl=no --encoding=h264 --username=eric tcp:localhost:10000
2016-10-19 15:29:58,390 Xpra gtk2 client version 1.0-r14149 64-bit
2016-10-19 15:29:58,390  running on Linux Fedora 24 Twenty Four
2016-10-19 15:29:58,391 Warning: failed to import opencv:
2016-10-19 15:29:58,392  No module named cv2
2016-10-19 15:29:58,392  webcam forwarding is disabled
2016-10-19 15:29:58,575 GStreamer version 1.8.3 for Python 2.7.12 64-bit
2016-10-19 15:29:59,010  keyboard settings: rules=evdev, model=pc101, layout=fr
2016-10-19 15:29:59,011  desktop size is 1680x1050 with 1 screen:
2016-10-19 15:29:59,012   :0.0 (444x277 mm - DPI: 96x96) workarea: 1680x1016
2016-10-19 15:29:59,012     monitor 1 (474x296 mm - DPI: 90x90)
2016-10-19 15:29:59,548 Xpra X11 server version 1.0-r14149 64-bit
2016-10-19 15:29:59,549  running on Linux CentOS Linux 7.2.1511 Core
2016-10-19 15:29:59,549 enabled remote logging
2016-10-19 15:29:59,551 Attached to tcp:localhost:10000 (press Control-C to 
detach)

2016-10-19 15:30:36,590 server requested disconnect: server shutdown
[eric@lys ~]$ xpra attach --opengl=no --encoding=h264 --username=eric 
tcp:localhost:10000
2016-10-19 15:44:38,912 Xpra gtk2 client version 1.0-r14149 64-bit
2016-10-19 15:44:38,912  running on Linux Fedora 24 Twenty Four
2016-10-19 15:44:38,913 Warning: failed to import opencv:
2016-10-19 15:44:38,913  No module named cv2
2016-10-19 15:44:38,913  webcam forwarding is disabled
2016-10-19 15:44:39,086 GStreamer version 1.8.3 for Python 2.7.12 64-bit
2016-10-19 15:44:39,544  keyboard settings: rules=evdev, model=pc101, layout=fr
2016-10-19 15:44:39,545  desktop size is 1680x1050 with 1 screen:
2016-10-19 15:44:39,545   :0.0 (444x277 mm - DPI: 96x96) workarea: 1680x1016
2016-10-19 15:44:39,545     monitor 1 (474x296 mm - DPI: 90x90)
2016-10-19 15:44:40,073 Xpra X11 server version 1.0-r14149 64-bit
2016-10-19 15:44:40,073  running on Linux CentOS Linux 7.2.1511 Core
2016-10-19 15:44:40,074 enabled remote logging
2016-10-19 15:44:40,076 Attached to tcp:localhost:10000 (press Control-C to 
detach)

2016-10-19 15:45:21,716 server requested disconnect: server shutdown
[eric@lys ~]$ xpra attach --opengl=no --encoding=h264 --username=eric 
tcp:localhost:10000
2016-10-19 15:53:52,571 Xpra gtk2 client version 1.0-r14149 64-bit
2016-10-19 15:53:52,572  running on Linux Fedora 24 Twenty Four
2016-10-19 15:53:52,572 Warning: failed to import opencv:
2016-10-19 15:53:52,572  No module named cv2
2016-10-19 15:53:52,573  webcam forwarding is disabled
2016-10-19 15:53:52,753 GStreamer version 1.8.3 for Python 2.7.12 64-bit
2016-10-19 15:53:53,200  keyboard settings: rules=evdev, model=pc101, layout=fr
2016-10-19 15:53:53,202  desktop size is 1680x1050 with 1 screen:
2016-10-19 15:53:53,203   :0.0 (444x277 mm - DPI: 96x96) workarea: 1680x1016
2016-10-19 15:53:53,204     monitor 1 (474x296 mm - DPI: 90x90)
2016-10-19 15:53:53,756 Xpra X11 server version 1.0-r14149 64-bit
2016-10-19 15:53:53,756  running on Linux CentOS Linux 7.2.1511 Core
2016-10-19 15:53:53,757 enabled remote logging
2016-10-19 15:53:53,758 Attached to tcp:localhost:10000 (press Control-C to 
detach)

2016-10-19 15:54:19,504 downloaded 7395 bytes to application/pdf file for 
printing:
2016-10-19 15:54:19,504  
'/home/eric/Downloads/2063309e720547981b7a1bdb85b93ff4306c5c78.pdf'
2016-10-19 15:54:19,505  sending 'Untitled1' to printer 'Xerox_Phaser_3250'
2016-10-19 15:54:19,507 Unhandled error while processing a 'send-file' packet 
from peer using <bound method XpraClient._process_send_file of gtk2.client>
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xpra/client/client_base.py", line 
871, in process_packet
    handler(packet)
  File "/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 
278, in _process_send_file
    self.do_process_downloaded_file(filename, mimetype, printit, openit, 
filesize, options)
  File "/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 
284, in do_process_downloaded_file
    self._print_file(filename, mimetype, options)
  File "/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 
322, in _print_file
    job = print_files(printer, [filename], title, options)
  File "/usr/lib64/python2.7/site-packages/xpra/platform/pycups_printing.py", 
line 412, in print_files
    printpid = conn.printFiles(printer, filenames, title, actual_options)
TypeError: Keys and values must be strings
2016-10-19 15:56:57,513 server requested disconnect: server shutdown
$> xpra -d printing --daemon=no start :100 
--tcp-auth=password:value=${XPRA_PASSWORD} --bind-tcp=${XPRA_IP}:10000
X.Org X Server 1.17.2
Release Date: 2015-06-16
X Protocol Version 11, Revision 0
Build Operating System:  2.6.32-220.17.1.el6.x86_64 
Current Operating System: Linux xappdisp_eric 4.7.7-200.fc24.x86_64 #1 SMP Sat 
Oct 8 00:21:59 UTC 2016 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-4.7.7-200.fc24.x86_64 
root=/dev/mapper/fedora-root ro rd.lvm.lv=fedora/root rd.lvm.lv=fedora/swap 
resume=/dev/dm-1 rhgb quiet LANG=fr_FR.UTF-8
Build Date: 20 November 2015  02:44:25PM
Build ID: xorg-x11-server 1.17.2-10.el7 
Current version of pixman: 0.32.6
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/home/rdisp/.xpra/Xorg.:100.log", Time: Wed Oct 19 13:53:45 2016
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
created unix domain socket: /home/rdisp/.xpra/xappdisp_eric-100
Warning: libvpx ABI version 5 is too old:
 disabling YUV444P support with VP9
Warning: failed to load the mdns avahi publisher:
 No module named avahi
 either fix your installation or use the 'mdns=no' option
Warning: webcam forwarding is disabled
 the virtual video directory '/sys/devices/virtual/video4linux' was not found
 make sure that the 'v4l2loopback' kernel module is installed and loaded
found 0 virtual video devices for webcam forwarding
Warning: failed to import GStreamer:
 GStreamer 1.0: Namespace Gst not available
 GStreamer 0.10: No module named pygst
Error: failed to query sound subsystem:
 query did not return any data
D-Bus notification forwarding is available
started command '/home/rdisp/.xpra/xpra_child.sh' with pid 68
local sockets we can use for printing: ['/home/rdisp/.xpra/xappdisp_eric-100']
xpra X11 version 1.0-r14149 64-bit
 uid=1000, gid=1000
 running with pid 18 on Linux CentOS Linux 7.2.1511 Core
 connected to X11 display :100
xpra is ready.
pycups settings: DEFAULT_CUPS_DBUS=1, CUPS_DBUS=1, POLLING_DELAY=60
pycups settings: PRINTER_PREFIX=, ADD_LOCAL_PRINTERS=False
pycups settings: FORWARDER_TMPDIR=/tmp
pycups settings: SKIPPED_PRINTERS=['Cups-PDF']
DEFAULT_CUPS_OPTIONS={'fit-to-page': 'True'}
get_printer_definitions() UNPROBED_PRINTER_DEFS={}, GENERIC=True
get_mimetype()=['application/pdf', 'application/postscript']
get_lpinfo_drv(Generic PDF Printer) command=['/usr/sbin/lpinfo', 
'--make-and-model', 'Generic PDF Printer', '-m']
lpinfo out=lsb/usr/cupsfilters/Generic-PDF_Printer-PDF.ppd Generic PDF Printer\n
lpinfo err=
get_lpinfo_drv(Generic PostScript Printer) command=['/usr/sbin/lpinfo', 
'--make-and-model', 'Generic PostScript Printer', '-m']
lpinfo out=drv:///sample.drv/generic.ppd Generic PostScript Printer\n
lpinfo err=
pycups settings: PRINTER_DEF={'application/postscript': ['-m', 
'drv:///sample.drv/generic.ppd'], 'application/pdf': ['-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']}
printer forwarding enabled using postscript and pdf
init_printing() printing=True
7.8GB of system memory
New tcp connection received from 172.19.0.1:47172
Authentication required by password authenticator module
 sending challenge for username 'eric' using hmac digest
Handshake complete; enabling connection
Python/Gtk2 Linux Fedora 24 Twenty Four x11 client version 1.0-r14149 64-bit
 connected from 'lys.local' as 'eric'
 using h264 as primary encoding
 also available:
  vp9, vp8, mpeg4, png, png/P, png/L, rgb24, jpeg, rgb32
 client root window size is 1680x1050 with 1 display:
  :0.0 (444x277 mm - DPI: 96x96) workarea: 1680x1016
    monitor 1 (474x296 mm - DPI: 90x90)
server virtual display now set to 1680x1050
setting key repeat rate from client: 600ms delay / 40ms interval
setting keymap: rules=evdev, model=pc101, layout=fr
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
>                   Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server
client 1: Attached to tcp:localhost:10000 (press Control-C to detach)
DPI set to 96 x 96
get_mimetype()=['application/pdf', 'application/postscript']
set_printers({'Xerox_Phaser_3250': {'printer-info': 'Xerox Phaser 3250', 
'mimetypes': ('application/pdf', 'application/postscript'), 'device-uri': 
'usb://Xerox/Phaser%203250?serial=3969298510'}, 'HP_HP_LaserJet_1200': 
{'printer-info': 'HP HP LaserJet 1200', 'mimetypes': ('application/pdf', 
'application/postscript'), 'device-uri': 
'dnssd://Hewlett-Packard%20HP%20LaserJet%201200%20%40%20tadoussac._ipp._tcp.local/cups?uuid=5d554f88-c8e2-39ae-5864-b09c8b939476'}},
 , None, , ) for X11ServerSource(1 : Protocol(tcp socket: 172.19.0.2:10000 <- 
172.19.0.1:47172))
add_printer('Xerox_Phaser_3250', {'printer-info': 'Xerox Phaser 3250', 
'mimetypes': ('application/pdf', 'application/postscript'), 'device-uri': 
'usb://Xerox/Phaser%203250?serial=3969298510'}, 'Xerox Phaser 3250', 'on 
lys.local (via xpra)', {'remote-device-uri': 
'usb://Xerox/Phaser%203250?serial=3969298510', 'source': 
'2063309e720547981b7a1bdb85b93ff4306c5c78', 'socket-path': 
'/home/rdisp/.xpra/xappdisp_eric-100', 'display': ':100', 'remote-printer': 
'Xerox_Phaser_3250'}, <function printer_added at 0x1e40938>)
using printer definition '['-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']' for application/pdf
pycups_printing adding printer: ['-p', 'Xerox_Phaser_3250', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=Xerox_Phaser_3250&remote-device-uri=usb%3A%2F%2FXerox%2FPhaser%25203250%3Fserial%3D3969298510&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'Xerox Phaser 3250', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']
exec_lpadmin(['-p', 'Xerox_Phaser_3250', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=Xerox_Phaser_3250&remote-device-uri=usb%3A%2F%2FXerox%2FPhaser%25203250%3Fserial%3D3969298510&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'Xerox Phaser 3250', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']) 
command=['/usr/sbin/lpadmin', '-p', 'Xerox_Phaser_3250', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=Xerox_Phaser_3250&remote-device-uri=usb%3A%2F%2FXerox%2FPhaser%25203250%3Fserial%3D3969298510&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'Xerox Phaser 3250', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']
add_printer('HP_HP_LaserJet_1200', {'printer-info': 'HP HP LaserJet 1200', 
'mimetypes': ('application/pdf', 'application/postscript'), 'device-uri': 
'dnssd://Hewlett-Packard%20HP%20LaserJet%201200%20%40%20tadoussac._ipp._tcp.local/cups?uuid=5d554f88-c8e2-39ae-5864-b09c8b939476'},
 'HP HP LaserJet 1200', 'on lys.local (via xpra)', {'remote-device-uri': 
'dnssd://Hewlett-Packard%20HP%20LaserJet%201200%20%40%20tadoussac._ipp._tcp.local/cups?uuid=5d554f88-c8e2-39ae-5864-b09c8b939476',
 'source': '2063309e720547981b7a1bdb85b93ff4306c5c78', 'socket-path': 
'/home/rdisp/.xpra/xappdisp_eric-100', 'display': ':100', 'remote-printer': 
'HP_HP_LaserJet_1200'}, <function printer_added at 0x7f9a641a9050>)
using printer definition '['-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']' for application/pdf
pycups_printing adding printer: ['-p', 'HP_HP_LaserJet_1200', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=HP_HP_LaserJet_1200&remote-device-uri=dnssd%3A%2F%2FHewlett-Packard%2520HP%2520LaserJet%25201200%2520%2540%2520tadoussac._ipp._tcp.local%2Fcups%3Fuuid%3D5d554f88-c8e2-39ae-5864-b09c8b939476&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'HP HP LaserJet 1200', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']
exec_lpadmin(['-p', 'HP_HP_LaserJet_1200', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=HP_HP_LaserJet_1200&remote-device-uri=dnssd%3A%2F%2FHewlett-Packard%2520HP%2520LaserJet%25201200%2520%2540%2520tadoussac._ipp._tcp.local%2Fcups%3Fuuid%3D5d554f88-c8e2-39ae-5864-b09c8b939476&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'HP HP LaserJet 1200', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']) 
command=['/usr/sbin/lpadmin', '-p', 'HP_HP_LaserJet_1200', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=HP_HP_LaserJet_1200&remote-device-uri=dnssd%3A%2F%2FHewlett-Packard%2520HP%2520LaserJet%25201200%2520%2540%2520tadoussac._ipp._tcp.local%2Fcups%3Fuuid%3D5d554f88-c8e2-39ae-5864-b09c8b939476&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'HP HP LaserJet 1200', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd']
returncode(['/usr/sbin/lpadmin', '-p', 'Xerox_Phaser_3250', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=Xerox_Phaser_3250&remote-device-uri=usb%3A%2F%2FXerox%2FPhaser%25203250%3Fserial%3D3969298510&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'Xerox Phaser 3250', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd'])=0
the remote printer 'Xerox_Phaser_3250' has been configured
returncode(['/usr/sbin/lpadmin', '-p', 'HP_HP_LaserJet_1200', '-v', 
'xpraforwarder:/tmp?mimetype=application%2Fpdf&socket-path=%2Fhome%2Frdisp%2F.xpra%2Fxappdisp_eric-100&remote-printer=HP_HP_LaserJet_1200&remote-device-uri=dnssd%3A%2F%2FHewlett-Packard%2520HP%2520LaserJet%25201200%2520%2540%2520tadoussac._ipp._tcp.local%2Fcups%3Fuuid%3D5d554f88-c8e2-39ae-5864-b09c8b939476&source=2063309e720547981b7a1bdb85b93ff4306c5c78&display=%3A100',
 '-D', 'HP HP LaserJet 1200', '-L', 'on lys.local (via xpra)', '-E', '-o', 
'printer-is-shared=true', '-u', 'allow:all', '-P', 
'/usr/share/ppd/cupsfilters/Generic-PDF_Printer-PDF.ppd'])=0
the remote printer 'HP_HP_LaserJet_1200' has been configured
failed to manage client <gtk.gdk.Window object at 0x2005f50 (GdkWindow at 
0x2040c60)>: XError: BadWindow
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xpra/x11/gtk2/wm.py", line 346, in 
_manage_client
    self.do_manage_client(gdkwindow)
  File "/usr/lib64/python2.7/site-packages/xpra/gtk_common/error.py", line 168, 
in __exit__
    trap._exit(True)
  File "/usr/lib64/python2.7/site-packages/xpra/gtk_common/error.py", line 100, 
in _exit
    raise XError(get_X_error(error))
XError: XError: BadWindow
invalid window specified for refresh: 9
New unix-domain connection received on /home/rdisp/.xpra/xappdisp_eric-100
Python/GObject/Print client version 1.0-r14149 64-bit
 connected from 'xappdisperic' as 'root'
process_print: ('2063309e720547981b7a1bdb85b93ff4306c5c78', 'application/pdf', 
'7395 bytes', '2063309e720547981b7a1bdb85b93ff4306c5c78', 'Untitled1', 
'Xerox_Phaser_3250', '1', 'PageSize=A4 
job-uuid=urn:uuid:8969ba04-18ed-3bf4-5b5f-6d4619a262de 
job-originating-host-name=172.19.0.3 time-at-creation=1476885259 
time-at-processing=1476885259')
process_print: got 7395 bytes for file 2063309e720547981b7a1bdb85b93ff4306c5c78
sha1 digest: c3576dac636aa5936be2265728db719be87b74c9
parsed printer options: {'sha1': 'c3576dac636aa5936be2265728db719be87b74c9', 
'printer': 'Xerox_Phaser_3250', 'options': {'time-at-processing': '1476885259', 
'time-at-creation': '1476885259', 'job-originating-host-name': '172.19.0.3', 
'PageSize': 'A4', 'job-uuid': 'urn:uuid:8969ba04-18ed-3bf4-5b5f-6d4619a262de'}, 
'copies': '1', 'title': 'Untitled1'}
'Untitled1' sent to X11ServerSource(1 : Protocol(tcp socket: 172.19.0.2:10000 
<- 172.19.0.1:47172)) for printing on 'Xerox_Phaser_3250'
send_file('2063309e720547981b7a1bdb85b93ff4306c5c78', 'application/pdf', <type 
'str'>, '7395 bytes', True, True, {'sha1': 
'c3576dac636aa5936be2265728db719be87b74c9', 'printer': 'Xerox_Phaser_3250', 
'options': {'time-at-processing': '1476885259', 'time-at-creation': 
'1476885259', 'job-originating-host-name': '172.19.0.3', 'PageSize': 'A4', 
'job-uuid': 'urn:uuid:8969ba04-18ed-3bf4-5b5f-6d4619a262de'}, 'copies': '1', 
'title': 'Untitled1'})
not sending to X11ServerSource(2 : Protocol(unix-domain 
socket:/home/rdisp/.xpra/xappdisp_eric-100)) (wanted 
uuid=2063309e720547981b7a1bdb85b93ff4306c5c78)
'Untitled1' (7KB) sent to 1 client for printing
client 1: downloaded 7395 bytes to application/pdf file for printing:
client 1:  '/home/eric/Downloads/2063309e720547981b7a1bdb85b93ff4306c5c78.pdf'
client 1:  sending 'Untitled1' to printer 'Xerox_Phaser_3250'
client 1: Unhandled error while processing a 'send-file' packet from peer using 
<bound method XpraClient._process_send_file of gtk2.client>
client 1:   File 
"/usr/lib64/python2.7/site-packages/xpra/client/client_base.py", line 871, in 
process_packet
client 1:     handler(packet)
client 1:   File 
"/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 278, in 
_process_send_file
client 1:     self.do_process_downloaded_file(filename, mimetype, printit, 
openit, filesize, options)
client 1:   File 
"/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 284, in 
do_process_downloaded_file
client 1:     self._print_file(filename, mimetype, options)
client 1:   File 
"/usr/lib64/python2.7/site-packages/xpra/net/file_transfer.py", line 322, in 
_print_file
client 1:     job = print_files(printer, [filename], title, options)
client 1:   File 
"/usr/lib64/python2.7/site-packages/xpra/platform/pycups_printing.py", line 
412, in print_files
client 1:     printpid = conn.printFiles(printer, filenames, title, 
actual_options)
xpra client 2 disconnected.
all children have exited and --exit-with-children was specified, exiting
Disconnecting client 172.19.0.1:47172:
 server shutdown
remove_printer(Xerox_Phaser_3250)
exec_lpadmin(['-x', 'Xerox_Phaser_3250']) command=['/usr/sbin/lpadmin', '-x', 
'Xerox_Phaser_3250']
remove_printer(HP_HP_LaserJet_1200)
exec_lpadmin(['-x', 'HP_HP_LaserJet_1200']) command=['/usr/sbin/lpadmin', '-x', 
'HP_HP_LaserJet_1200']
xpra client 1 disconnected.
returncode(['/usr/sbin/lpadmin', '-x', 'Xerox_Phaser_3250'])=0
returncode(['/usr/sbin/lpadmin', '-x', 'HP_HP_LaserJet_1200'])=0
xpra is terminating.
closing TCP socket 0.0.0.0:10000
killing xvfb with pid 34
removing socket /home/rdisp/.xpra/xappdisp_eric-100
(II) Server terminated successfully (0). Closing log file.

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