[Bug 1750403] Re: Live Session - Increased memory usage with preinstalled snap (fails to start with - gnome-session timeout)

[Iain Lane]

On Tue, Feb 20, 2018 at 02:31:10PM -0000, Jean-Baptiste Lallement wrote:
> I noticed that core 3887 is on the image while 4017 is published to
> stable, a theory is that the refresh to stable happens during boot and
> consumes lot of resources leading to memory starvation or timeouts.

I don't think so, since that has OnStartupSec=15m (and
RandomizedDelaySec=6h but that could turn out to be close to 0) it won't
fire for at least 15 minutes.

Are you able to reproduce yourself? I don't know the details but I
suppose that seeded snaps (/var/lib/snapd/seed.yaml) need to be unpacked
somehow during boot - maybe that's it? Perhaps systemd-analyze or the
journal can tell us - could those be attached to test runs so we can
inspect?

-- 
Iain Lane                                  [ iain at orangesquash.org.uk ]
Debian Developer                                   [ laney at debian.org ]
Ubuntu Developer                                   [ laney at ubuntu.com ]

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https://bugs.launchpad.net/bugs/1750403

Title:
  Live Session - Increased memory usage with preinstalled snap (fails to
  start with - gnome-session timeout)

Status in casper package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu Desktop Bionic 20180219 on VM

  The session fails to start. There is the following message in the
  journal:

  Feb 19 16:01:54 ubuntu gnome-session[1469]: gnome-session-binary[1469]: WARNING: Application 'org.gnome.Shell.desktop' failed to register before timeout
  Feb 19 16:01:54 ubuntu gnome-session-binary[1469]: WARNING: Application 'org.gnome.Shell.desktop' failed to register before timeout
  Feb 19 16:01:54 ubuntu gnome-session-binary[1469]: Unrecoverable failure in required component org.gnome.Shell.desktop
  Feb 19 16:01:54 ubuntu gnome-session[1469]: gnome-session-binary[1469]: CRITICAL: We failed, but the fail whale is dead. Sorry....
  Feb 19 16:01:54 ubuntu gnome-session-binary[1469]: CRITICAL: We failed, but the fail whale is dead. Sorry....
  Feb 19 16:01:54 ubuntu at-spi-bus-launcher[1582]: XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
  Feb 19 16:01:54 ubuntu at-spi-bus-launcher[1582]:       after 21 requests (21 known processed) with 0 events remaining.

  On hardware boot time is slow but there is no timeout.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-session (not installed)
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Feb 19 17:04:42 2018
  InstallationDate: Installed on 2013-09-03 (1629 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
  ProcEnviron:
   TERM=screen-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: gnome-session
  UpgradeStatus: Upgraded to bionic on 2018-01-26 (24 days ago)

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