[X2Go-User] Upgrades

[Robert Dinse]

      If I just leave a session up, after an hour or two it will crash and burn
even if I am not doing anything.  I saw segfaults on mate-panel so I thought
perhaps an issue with Mate and not X2go, so I started a session in LXDE, it
exploded the same way.  If I just remove rather than purge the software, it 
does not fix, so yes, probably related to database.  When it explodes and I
try to reconnect to the session which shows up in the window after I login,
then it wedges.  If instead I terminate this session and start a new one, it
does not wedge.  Rebooting the server does not fix, nor the client, so 
processes left running can't be the issue.  I have ssh sessions with xterms
going into machines at the same location over the same network connections and
they stay up no problem, so it's not a network issue.  For reasons I don't
understand it seems to affect some servers more than others.  I have about an
even split of Redhat baed servers, Centos6/7, Scientific Linux 6/7, Fedora,
and Debian based, Debian, Mint, Ubuntu, and Zorin.  So far this has only
occurred on the Debian based servers.  It has happened on Mint, Ubuntu, and
Zorin thus far.

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On Sat, 3 Mar 2018, Mihai Moldovan wrote:

> Date: Sat, 3 Mar 2018 06:16:47 +0100
> From: Mihai Moldovan <ionic at ionic.de>
> To: Robert Dinse <nanook at eskimo.com>
> Cc: "x2go-user at lists.x2go.org" <x2go-user at lists.x2go.org>
> Subject: Re: Upgrades
> 
> * On 03/03/2018 04:45 AM, Robert Dinse wrote:
>>
>>       I have now had three different machines, a ubuntu server, a mint server,
>> and a zorin server with the most recent builds installed display very strange
>> behavior.
>>
>>       Initially they work, I connect, and at some point during the session,
>> it disconnects, tells me to check my network.
>>
>>       I go to reconnect and in the main window it says:
>>
>> Loop: PANIC! Failure negotiating the session in stage '7'.
>> Error: Failure negotiating the session in stage '7'.
>> Loop: PANIC! Wrong version or invalid session authentication cookie.
>> Error: Wrong version or invalid session authentication cookie.
>> Session: Terminating session at 'Fri Mar 2 19:06:40 2018'.
>> Session: Session terminated at  'Fri Mar 2 19:06:40 2018'.
>>
>>       I also get a POP UP that says:
>>
>> The remote proxy closed teh connection while negotiating the session. This may
>> be due to the wrong authentication credentials passed to the server.
>>
>>       Once it enters this state I can not connect to the server again.
>> Rebooting both client and server does not fix the problem (and this wipes out
>> everything in  /tmp and /var/tmp as I have both in tmpfs file systems).
>>
>>       The only thing I've found that fixes it is completely purging the server
>> x2go software and re-installing it.
>
> Reinstalling shouldn't change any state, other than maybe reinitializing the
> database.
>
> When this happens, are there still x2goagent or nxagent processes around? Do
> x2glistsessions_root, x2gogetports, x2gogetdisplays report sane values?
>
>
> Maybe x2goagent is crashing or otherwise misbehaving.
>
> Is there any known trigger for this?
>
>
>
> Mihai
>
>