[X2Go-User] x2go-Server needs 5 minutes to respond

[K. Reinhold Trier]

Hi,

last Thursday after an automatic update of the x2go-server our clients 
didn't receive any more answer from the server. We had to switch to vnc 
to get our workstations connected again. This morning, after an other 
automatic update of the x2go-software, I noticed that clients could 
connect again - but after an unacceptable delay of about 5 minutes. Here 
our data:
We are on Ubuntu 16.04.3 LTSUbuntu 16.04.3 LTS
When starting x2goclient on a ubuntu client, after about 5 minutes it 
shows the details:

NXPROXY - Version 3.5.0

Info: Proxy running in client mode with pid '25793'.

Session: Starting session at 'Mon Nov 13 18:28:30 2017'.

Info: Using abstract X11 socket in kernel namespace for accessing 
DISPLAY=:0.

Info: Connecting to remote host 'localhost:42485'.

Info: Connection to remote proxy 'localhost:42485' established.

Info: Connection with remote proxy completed.

Warning: Unrecognized session type 'unix-kde-depth_24'. Assuming agent 
session.

Info: Using ADSL link parameters 512/24/1/0.

Info: Using cache parameters 4/4096KB/8192KB/8192KB.

Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_24'.

Info: Using ZLIB data compression 1/1/32.

Info: Using ZLIB stream compression 4/4.

Info: No suitable cache file found.

Info: Forwarding X11 connections to display ':0'.

Session: Session started at 'Mon Nov 13 18:28:31 2017'.

Info: Established X server connection.

Info: Using shared memory parameters 0/0K

Now the client windows opens. To give more information about our 
installation:
dpkg -l|grep x2go yields:
ii  cups-x2go 3.0.1.3-1                          all          Virtual 
X2Go printer for CUPS
ii  x2goagent 2:3.5.0.33-0~710~ubuntu16.04.1     all          X2Go agent
ii  x2goclient 4.1.1.0-0~1679~ubuntu16.04.1       amd64        X2Go 
Client application (Qt4)
ii  x2golxdebindings 1.0.2.4-0~70~ubuntu16.04.1         all          
LXDE bindings for X2Go
ii  x2gomatebindings 0.0.1.5-0~203~ubuntu16.04.1        amd64        
X2Go MATE bindings and MIME types
ii  x2goserver 4.0.1.22-0~1197~ubuntu16.04.1      amd64        X2Go 
server daemon scripts
ii  x2goserver-extensions 4.0.1.22-0~1197~ubuntu16.04.1      
all          X2Go server daemon scripts (extensions)
ii  x2goserver-printing 4.0.1.22-0~1197~ubuntu16.04.1      all          
X2Go server daemon scripts (printing)
ii  x2goserver-xsession 4.0.1.22-0~1197~ubuntu16.04.1      all          
X2Go server daemon scripts (Xsession runner)

I extracted the relevant entries in syslog during that process. They are:

Nov 13 12:12:35 goho /usr/bin/x2goumount-session[37611]: successfully 
unmounted "/tmp/.x2go-name/media/disk/_home_reinhold_MiniUbuntu"
Nov 13 12:12:35 goho /usr/bin/x2goumount-session[37611]: successfully 
unmounted "/tmp/.x2go-name/media/disk/_home_reinhold_Dokumente"
Nov 13 12:12:36 goho /usr/bin/x2goumount-session[37611]: ERROR: failed 
to unmount "/tmp/.x2go-name/spool/C-name-389-1510571109_stDICEWM_dp24"
Nov 13 12:16:21 goho /usr/sbin/x2gocleansessions[3351]: 
name-389-1510571780_stDICEWM_dp24: state file for this session does not 
exist: /tmp/.x2go-name/C-name-389-1510571780_stDICEWM_dp24/state
Nov 13 12:16:21 goho /usr/bin/x2gostartagent: successfully started X2Go 
agent session with ID name-389-1510571780_stDICEWM_dp24
Nov 13 12:16:25 goho /usr/bin/x2goruncommand: launching session with 
Xsession-x2go mechanism, using STARTUP="icewm-session"
Nov 13 12:16:25 goho /usr/bin/x2goruncommand: dbus wrapper available as 
/usr/bin/dbus-run-session
Nov 13 12:16:31 goho /usr/bin/x2gosetkeyboard: Setting X keyboard 
according to /home/name/.x2go/C-name-389-1510571780_stDICEWM_dp24/keyboard
Nov 13 12:21:15 goho /usr/bin/x2goumount-session[27991]: ERROR: failed 
to unmount "/tmp/.x2go-name/spool/C-name-389-1510571780_stDICEWM_dp24"

And looking for the processes  with ps -ef|grep x2go at the beginning:

name    38975 38936  0 12:13 ?        00:00:00 bash -l -c echo 
"X2GODATABEGIN:0b144655-d1b7-4fdf-9dd8-a3b6483c2c32"; export PATH= ...
name    38976 38975  0 12:13 ?        00:00:00 /bin/bash 
/usr/bin/x2gostartagent 1800x1100 adsl 16m-jpeg-9 unix-kde-depth_24 de 
auto 1 D ICEWM both

And then, some minutes later:

name    20337     1  0 12:16 ?        00:00:00 
/usr/lib/nx/../x2go/bin/x2goagent -extension XFIXES -nolisten tcp 
-nolisten tcp -dpi 96 -D -auth /home/name/.Xauthority -geometry ...
name    20547 38936  0 12:16 ?        00:00:00 bash -l -c echo 
"X2GODATABEGIN:f57debe6-7893-4214-8344-eb59d431ddaa"; export PATH= ...
name    20548 20547  5 12:16 ?        00:00:00 /usr/bin/perl 
/usr/bin/x2gomountdirs dir name-389-1510571780_stDICEWM_dp24 reinhold ...
name    20569     1  0 12:16 ?        00:00:00 ssh -x -a 
-oClearAllForwardings=yes -oServerAliveInterval=300 
-oIdentityFile=/home/name/.x2go/ssh/key.VE6405 -oUserKnownHostsFile= ...
name    20571     1  0 12:16 ?        00:00:00 /bin/bash 
/usr/bin/x2goruncommand 389 20337 name-389-1510571780_stDICEWM_dp24 
43965 icewm-session nosnd D
name    20600 20337  0 12:16 ?        00:00:00 
/usr/lib/nx/../x2go/bin/x2goagent -extension XFIXES -nolisten tcp 
-nolisten tcp -dpi 96 -D -auth /home/name/.Xauthority -geometry ...
name    20688 20571  0 12:16 ?        00:00:00 /bin/bash 
/usr/bin/x2gosetkeyboard
name    20769 20571  0 12:16 ?        00:00:00 /usr/bin/dbus-run-session 
/etc/x2go/Xsession
name    20771 20769  0 12:16 ?        00:00:00 /bin/sh /etc/x2go/Xsession
name    20805 20771  0 12:16 ?        00:00:00 xrdb -merge 
/etc/x2go/Xresources/x11-common
name    20814     1  0 12:16 ?        00:00:00 sshfs -o 
idmap=user,uid=1181,gid=100,default_permissions,ServerAliveInterval=300,IdentityFile=/home/name/.x2go/ssh/key.VE6405,UserKnownHostsFile= 
...
name    20878 20548  0 12:16 ?        00:00:00 sh -c timeout 30 sshfs  
-o idmap=user,uid=`id -u`,gid=`id 
-g`,default_permissions,ServerAliveInterval=300,IdentityFile=/home/name/.x2go/ssh/key.VE6405,UserKnownHostsFile= 
...
name    20881 20878  0 12:16 ?        00:00:00 timeout 30 sshfs -o 
idmap=user,uid=1181,gid=100,default_permissions,ServerAliveInterval=300,IdentityFile=/home/name/.x2go/ssh/key.VE6405,UserKnownHostsFile= 
...
name    20882 20881  0 12:16 ?        00:00:00 sshfs -o 
idmap=user,uid=1181,gid=100,default_permissions,ServerAliveInterval=300,IdentityFile=/home/name/.x2go/ssh/key.VE6405,UserKnownHostsFile= 
...
name    20886     1  0 12:16 ?        00:00:00 ssh -x -a 
-oClearAllForwardings=yes -oServerAliveInterval=300 
-oIdentityFile=/home/name/.x2go/ssh/key.VE6405 -oUserKnownHostsFile= ...

Is there somebody who could help us getting back to working 
x2go-installation?

Best regards

Reinhold




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