[X2Go-User] X2Go Client suddenly failing to connect

Ivan Gomez igomez at zencos.com
Thu Mar 29 20:03:19 CEST 2018


Hi Mihai,



> That's the old, more or less unsupported version and additionally provided by EPEL, not by our repositories.

Interesting. Thank you for pointing that out. I would like to correct this to run with a supported stack then.

Apologies if I'm missing something obvious, but is there documentation that shows how to install from your repositories on RHEL 7?



I installed x2goserver following the instructions from the wiki<https://wiki.x2go.org/doku.php/doc:installation:x2goserver>:



RHEL 7

Add the EPEL repository:

EPEL Installation Intructions<https://fedoraproject.org/wiki/EPEL#How_can_I_use_these_extra_packages.3F>

Check that you have activated the "optional" channel:

sudo subscription-manager repos --list

If the optional channel for your base channel is not active, activate it.

sudo subscription-manager repos --enable=rhel-7-server-optional-rpms

Or use the RHNS web interface to activate the channel "RHEL Server Optional"

Then

sudo yum install x2goserver x2goserver-xsession



Looking through my yum history confirms what you said about the software coming from EPEL:



Transaction ID : 23

Begin time     : Wed Oct 11 16:16:03 2017

Begin rpmdb    : 732:22a7d0c0c35d36230fbfc3bd93be2adab6d0679c

End time       :            16:16:09 2017 (6 seconds)

End rpmdb      : 768:eb5810a8c8048bd3c405c89d5589f03c7aa209a9

User           : root <root>

Return-Code    : Success

Command Line   : install x2goserver -y

Transaction performed with:

    Installed     rpm-4.11.3-21.el7.x86_64                  @rhel-7-server-rpms/7.3

    Installed     subscription-manager-1.17.15-1.el7.x86_64 @rhel-7-server-rpms/7.3

    Installed     yum-3.4.3-150.el7.noarch                  @rhel-7-server-rpms/7.3

Packages Altered:

    Dep-Install bc-1.06.95-13.el7.x86_64                    @rhel-7-server-rpms

    Dep-Install fuse-sshfs-2.5-1.el7.x86_64                 @epel

    Dep-Install libNX_X11-3.5.0.32-3.el7.x86_64             @epel

    Dep-Install libNX_Xcomposite-3.5.0.32-3.el7.x86_64      @epel

    Dep-Install libNX_Xdamage-3.5.0.32-3.el7.x86_64         @epel

    Dep-Install libNX_Xdmcp-3.5.0.32-3.el7.x86_64           @epel

    Dep-Install libNX_Xext-3.5.0.32-3.el7.x86_64            @epel

    Dep-Install libNX_Xfixes-3.5.0.32-3.el7.x86_64          @epel

    Dep-Install libNX_Xinerama-3.5.0.32-3.el7.x86_64        @epel

    Dep-Install libNX_Xpm-3.5.0.32-3.el7.x86_64             @epel

    Dep-Install libNX_Xrandr-3.5.0.32-3.el7.x86_64          @epel

    Dep-Install libNX_Xrender-3.5.0.32-3.el7.x86_64         @epel

    Dep-Install libNX_Xtst-3.5.0.32-3.el7.x86_64            @epel

    Dep-Install libXcomp-3.5.0.32-3.el7.x86_64              @epel

    Dep-Install libXcompext-3.5.0.32-3.el7.x86_64           @epel

    Dep-Install libXcompshad-3.5.0.32-3.el7.x86_64          @epel

    Dep-Install libXfont-1.5.2-1.el7.x86_64                 @rhel-7-server-rpms

    Dep-Install nx-libs-3.5.0.32-3.el7.x86_64               @epel

    Dep-Install nxagent-3.5.0.32-3.el7.x86_64               @epel

    Dep-Install perl-Capture-Tiny-0.24-1.el7.noarch         @rhel-7-server-optional-rpms

    Dep-Install perl-Compress-Raw-Bzip2-2.061-3.el7.x86_64  @rhel-7-server-rpms

    Dep-Install perl-Compress-Raw-Zlib-1:2.061-4.el7.x86_64 @rhel-7-server-rpms

    Dep-Install perl-Config-Simple-4.59-15.el7.noarch       @rhel-7-server-optional-rpms

    Dep-Install perl-DBD-SQLite-1.39-3.el7.x86_64           @rhel-7-server-rpms

    Dep-Install perl-DBI-1.627-4.el7.x86_64                 @rhel-7-server-rpms

    Dep-Install perl-File-BaseDir-0.03-14.el7.noarch        @epel

    Dep-Install perl-File-Which-1.09-12.el7.noarch          @rhel-7-server-optional-rpms

    Dep-Install perl-IO-Compress-2.061-2.el7.noarch         @rhel-7-server-rpms

    Dep-Install perl-Net-Daemon-0.48-5.el7.noarch           @rhel-7-server-rpms

    Dep-Install perl-PlRPC-0.2020-14.el7.noarch             @rhel-7-server-rpms

    Dep-Install perl-Sys-Syslog-0.33-3.el7.x86_64           @rhel-7-server-rpms

    Dep-Install pwgen-2.07-1.el7.x86_64                     @epel

    Dep-Install x2goagent-3.5.0.32-3.el7.x86_64             @epel

    Install     x2goserver-4.0.1.20-1.el7.x86_64            @epel

    Dep-Install xorg-x11-font-utils-1:7.5-20.el7.x86_64     @rhel-7-server-rpms

    Dep-Install xorg-x11-fonts-misc-7.5-9.el7.noarch        @rhel-7-server-rpms



Thanks,

Ivan G.



-----Original Message-----
From: Mihai Moldovan [mailto:ionic at ionic.de]
Sent: Wednesday, March 28, 2018 7:22 PM
To: Ivan Gomez <igomez at zencos.com>
Cc: x2go-user at lists.x2go.org
Subject: Re: [X2Go-User] X2Go Client suddenly failing to connect



* On 03/28/2018 02:58 PM, Ivan Gomez wrote:

> libNX_X11-3.5.0.32-3.el7.x86_64

> libNX_Xcomposite-3.5.0.32-3.el7.x86_64

> libNX_Xdamage-3.5.0.32-3.el7.x86_64

> libNX_Xdmcp-3.5.0.32-3.el7.x86_64

> libNX_Xext-3.5.0.32-3.el7.x86_64

> libNX_Xfixes-3.5.0.32-3.el7.x86_64

> libNX_Xinerama-3.5.0.32-3.el7.x86_64

> libNX_Xpm-3.5.0.32-3.el7.x86_64

> libNX_Xrandr-3.5.0.32-3.el7.x86_64

> libNX_Xrender-3.5.0.32-3.el7.x86_64

> libNX_Xtst-3.5.0.32-3.el7.x86_64

> nxagent-3.5.0.32-3.el7.x86_64

> nx-libs-3.5.0.32-3.el7.x86_64

> x2goagent-3.5.0.32-3.el7.x86_64

> x2goserver-4.0.1.20-1.el7.x86_64



That's the old, more or less unsupported version and additionally provided by EPEL, not by our repositories.





> One new update on this issue:

> Updated x2gosever on one of the servers that was showing the issue to x2goserver-4.0.1.22-2.el7.x86_64. After the update, access through that server started working again.

> Any guidance to understand the root cause would still be greatly appreciated.



I'm afraid I can't offer a lot of help here.



You could look into ~/.x2go/C-<session-id>/session.log to see what the server-side process logged out.



At some point it must have failed to run correctly, otherwise the client-side nxproxy would have been able to connect successfully.



Debugging such issues is always difficult.







Mihai


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