X2Go Bug report logs - #204
Error starting an aborted session

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Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: Dick Kniep <dick@lindix.nl>

To: submit@bugs.x2go.org <submit@bugs.x2go.org>

Subject: Error starting an aborted session

Date: Wed, 8 May 2013 11:41:32 +0200

package: x2go-agent
Severity: severe
Version: 0.4.0.1

If a session is aborted because of a network problem, x2goagent does not end properly. Sometimes it does, most of the time it doesn't We are working with a ssh-proxy, maybe there is a cause. 

Included is the log on the server for the user. As you can see at a certain moment it says "nxagentBlockHandler: No application running. Closing the session." I don't know what causes this, it might be a segmentation fault in the application. However, it gets worse, because after this, it is impossible for the user to login again. The only way to end the session is by kill -9. After that the user can login again.......

NXAGENT - Version 3.5.0

Copyright (C) 2001, 2011 NoMachine.
See http://www.nomachine.com/ for more information.

Info: Agent running with pid '32154'.
Session: Starting session at 'Wed May  8 08:29:51 2013'.
Info: Proxy running in server mode with pid '32154'.
Info: Waiting for connection from 'localhost' on port '30001'.
Info: Accepted connection from '127.0.0.1'.
Info: Connection with remote proxy completed.
Info: Using ADSL link parameters 512/24/1/0.
Info: Using agent parameters 5000/10/50/0/0.
Info: Using cache parameters 4/4096KB/8192KB/8192KB.
Info: Using pack method '16m-jpeg-9' with session 'unix-kde-depth_17'.
Info: Using ZLIB data compression 1/1/32.
Info: Using ZLIB stream compression 4/4.
Info: No suitable cache file found.
Info: Listening to X11 connections on display ':50'.
Info: Established X client connection.
Info: Using shared memory parameters 1/1/0/0K.
Info: Using alpha channel in render extension.
Info: Not using local device configuration changes.
keyboard file created
SessionPath not defined
Session: Session started at 'Wed May  8 08:29:58 2013'.
I/O warning : failed to load external entity "/etc/nx/keystroke.cfg"
nxagentBlockHandler: No application running. Closing the session.
Session: Terminating session at 'Wed May  8 08:32:57 2013'.
Info: Waiting the cleanup timeout to complete.
Session: Session terminated at 'Wed May  8 08:32:58 2013'.





Met vriendelijke groet,
Dick Kniep
Lindix BV
tel. 036-5215580
mob. 06-50991858

Message #16 received at 204-done@bugs.x2go.org (full text, mbox, reply):

From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

To: Dick Kniep <dick@lindix.nl>, 204-done@bugs.x2go.org

Cc: control@bugs.x2go.org

Subject: Re: Bug#204: Error starting an aborted session

Date: Thu, 06 Jun 2013 01:49:32 +0200

[Message part 1 (text/plain, inline)]

tag #204 wontfix
close

Hi Dick

On Mi 08 Mai 2013 11:41:32 CEST Dick Kniep wrote:

> Included is the log on the server for the user. As you can see at a  
> certain moment it says "nxagentBlockHandler: No application running.  
> Closing the session." I don't know what causes this, it might be a

This is wanted by the NX developers. It means that the x2goagent runs  
with rootless=1 mode and it waits for an application to use this  
rootless mode x2goagent.

If no applications comes into play after a generous amount of time (it  
is hard-coded in NX) then the agent will end itself.

> segmentation fault in the application.

Yes, this may well be.

> However, it gets worse, because after this, it is impossible for the  
> user to login again. The only way to end the session is by kill -9.  
> After that the user can login again.......

This is probably related to some port handling problem in X2Go Server  
that we currently have in the stable release of X2Go Server.

I will close this bug and tag it as wontfix as the main issue may well  
be in your application (segmentation fault or similar).

Greets,
Mike


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