X2Go Bug report logs - #626
NX socket cleanup post-session

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From: owner@bugs.x2go.org (X2Go Bug Tracking System)
Subject: Bug#626 closed by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
 (X2Go issue (in src:x2goserver) has been marked as closed)
Message-ID: <handler.626.c.141235055412422.notifdone@bugs.x2go.org>
References: <20141003153544.225FD3D45E@ymir.das-netzwerkteam.de>
X-X2go-PR-Keywords: pending
X-X2go-PR-Message: they-closed 626
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Date: Fri, 03 Oct 2014 15:40:03 +0000
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This is an automatic notification regarding your Bug report
which was filed against the x2goserver package:

#626: NX socket cleanup post-session

It has been closed by Mike Gabriel <mike.gabriel@das-netzwerkteam.de>.

Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact Mike Gabriel <mike.gabriel@das-netzwerkteam.de> by
replying to this email.


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

To: 626-submitter@bugs.x2go.org

Cc: control@bugs.x2go.org, 626@bugs.x2go.org

Subject: X2Go issue (in src:x2goserver) has been marked as closed

Date: Fri, 3 Oct 2014 17:35:43 +0200 (CEST)

close #626
thanks

Hello,

we are very hopeful that X2Go issue #626 reported by you
has been resolved in the new release (4.0.1.17) of the
X2Go source project »src:x2goserver«.

You can view the complete changelog entry of src:x2goserver (4.0.1.17)
below, and you can use the following link to view all the code changes
between this and the last release of src:x2goserver.

    http://code.x2go.org/gitweb?p=x2goserver.git;a=commitdiff;h=6b428c94f421bc5ee21dc40b8507d84172dd7734;hp=ddbb2f0df266094ccdc61bee00e0b955a4e08c4f

If you feel that the issue has not been resolved satisfyingly, feel
free to reopen this bug report or submit a follow-up report with
further observations described based on the new released version
of src:x2goserver.

Thanks a lot for contributing to X2Go!!!

light+love
X2Go Git Admin (on behalf of the sender of this mail)

---
X2Go Component: src:x2goserver
Version: 4.0.1.17-0x2go1
Status: RELEASE
Date: Fri, 03 Oct 2014 17:09:23 +0200
Fixes: 623 626
Changes: 
 x2goserver (4.0.1.17-0x2go1) RELEASED; urgency=medium
 .
   * New upstream release (4.0.1.17):
     - Fix breakage of X2Go Server when upgrading from 4.0.1.15 while
       sessions are still in running / suspended state. (Fixes: #623).
     - Handle stale X11 socket files in cases where x2goagent has
       mysteriously disappeared (e.g. kill -9). (Fixes: #626).
     - Make sure that incompletely started up sessions get wiped from the
       session DB after 10 seconds.
     - Fix unreliable removal of client-side folder sharing desktop
       icons.
     - Update date in several man pages.
   * debian/control:
     + Upgrade x2goserver-xsession from Suggests: to Recommends:.

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

To: submit@bugs.x2go.org

Subject: NX agent dies not reliably remove socket files under /tmp/.X11-unix

Date: Thu, 02 Oct 2014 18:05:23 +0200

Package: nxagent
Version: 3.5.0.27
Severity: important

17:02 < bigfoot-> hmmm.  x2goagent is started with  -extension XFIXES 
                  -nolisten tcp -nolisten tcp -dpi 96 -D -auth 
                  /fs/staff/hsc/.Xauthority -geometry 800x600 -name 
                  X2GO-hsc-51-1412262126_stDmyxfce_dp24 :51
17:02 < bigfoot-> :50 is the already running (first) session
17:03 < bigfoot-> and x2goagent dies with 
                  https://pbot.rmdir.de/tt64QL-NNXqZomZoahDhJg

[...]

17:08 < bigfoot-> woglinde: I had to remove remaining /tmp/.X*-lock and 
                  /tmp/.X11-unix/X* that were owned by other users.  Works 
                  like a charm again now.
17:09 < bigfoot-> iow, a reboot would've helped, too (if it cleans up /tmp, 
                  that is).  but that's a non-option on this machine.

[...]

17:23 <@sunweaver> please report it as a bug!!!!
17:24 < bigfoot-> I'm still investigating; seeing this issue again now.  The 
                  process is as follows:
17:25 < bigfoot-> - some user logs in, gets :50
17:25 < bigfoot-> - some user logs in, gets :50
17:25 < bigfoot-> - /tmp/.X50-lock and /tmp/.X11-unix/X50 are owned by him now
17:25 < bigfoot-> - user logs out, which doesn't succeed completely (due to 
                  some yet unknown reason; he's got a default xfce setup in 
                  his home)
17:26 < bigfoot-> - user logs in via ssh and kills all his processes via  
                  killall -u username
17:26 < bigfoot-> afterwards, x2go seems to assume :50 is free, but the two 
                  aforementioned files still exist
17:26 < bigfoot-> the next user gets assigned :50, but this fails as the user 
                  doesn't have the permissions to access these files
17:27 < bigfoot-> So, who (or, which part of x2go) is responsible for removing 
                  these files?  When does/should this happen?



17:51 < bigfoot-> sunweaver: this change seemingly only changes the output, 
                  does this have an effect on the cleanup stuff?
17:51 <@sunweaver> no
17:51 <@sunweaver> the fix is four smoothing out mkigration from 4.0.1.15 to 
                   higher...
17:52 <@sunweaver> though there could be unexpected side effects...
17:52 <@sunweaver> there also is a patch in NX I introduced lately...
17:53 < bigfoot-> ok, but how should the new x2golistsessions and 
                  x2golistsessions_root affect my issue with cleanup?
17:55 <@sunweaver> http://code.x2go.org/gitweb?p=nx-libs.git;a=blob;f=debian/patches/027_nxcomp_abstract-X11-socket.full%2Blite.patch;h=4f614338cd51e19e05de87d097d623065d826d56;hb=bddc7e0ba4cef393ce56f75d1eb03255fe5ac6e1


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