X2Go Bug report logs - #1230
x2go fails unhelpfully when a session fails to start

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Package: x2goserver; Maintainer for x2goserver is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goserver is src:x2goserver.

Reported by: "Norman Gray" <gray@nxg.name>

Date: Fri, 27 Oct 2017 17:05:01 UTC

Severity: normal

Tags: pending

Found in version 4.0.1.20

Fixed in version 4.0.1.23

Full log

Message #26 received at 1230@bugs.x2go.org (full text, mbox, reply):

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Subject: Re: [X2Go-Dev] x2go fails unhelpfully when a session fails to start
To: Norman Gray <gray@nxg.name>, 1230@bugs.x2go.org
References: <AEF0C8DA-B122-4D28-BBA4-3E3A6463C5DD@nxg.name>
From: Mihai Moldovan <ionic@ionic.de>
Message-ID: <4eef6d5a-03c4-cfa8-d01c-31badb85fc2c@ionic.de>
Date: Thu, 2 Nov 2017 20:08:41 +0100
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[Message part 1 (text/plain, inline)]
Control: tag -1 -pending
Control: notfixed -1 4.0.1.21

On 10/27/2017 07:02 PM, Norman Gray wrote:
> Package: x2goserver
> Version: 4.0.1.20
> 
> When a username is rejected by the 'valid username' test (see separate 
> bug report<https://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=1229>), the 
> session doesn't fail, but simply seems to hang, giving no feedback about 
> the problem, nor, as far as I can see, reporting anything in the logs.
> 
> To reproduce, attempt to log in using a username such as '123x'.  The 
> session doesn't complete the setup, leaving the user at a blank screen.
> 
> Suggestion: a user-visible error message should be produced, and an 
> informative message sent to the system log.

I've tried catching errors while inserting values into the database, but it
turns out that doing this is not easily possible, since the current code relies
on brute-force adding of new DB entries and ignoring errors until it succeeds.
If a hard error occurs that will make any insertion fail, of course this will
loop forever.

I'll need to implement something more sophisticated that detects hard errors
which will always lead to failures.



Mihai



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