Problem removing a snap

Gustavo Niemeyer gustavo at niemeyer.net
Wed Nov 2 22:06:21 UTC 2016 

Ok, thanks for those details. We'll look more deeply into this tomorrow and
try to reproduce the issue.

To fix your problem, can you please try this simple hack to get over the
bug:

sudo mount --bind /snap/ubuntu-core/current /snap/viking-gps/1

This should allow the remove to go through.


On Wed, Nov 2, 2016 at 7:53 PM, Chris <cpollock at embarqmail.com> wrote:

> On Wed, 2016-11-02 at 18:43 -0200, Gustavo Niemeyer wrote:
> > Hi Chris,
> >
> > Can you please try updating your snapd package?
> >
> > Recent releases have a more reliable remove procedure that handles
> > these cases better.
> >
> According to apt-cache policy
>
> chris at localhost:~$ apt-cache policy snapd
> snapd:
>   Installed: 2.16ubuntu3
>   Candidate: 2.16ubuntu3
>   Version table:
>  *** 2.16ubuntu3 500
>         500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main
> amd64 Packages
>         100 /var/lib/dpkg/status
>      2.0.2 500
>         500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64
> Packages
>
> I tried to upgrade, sudo apt upgrade snapd
>
> chris at localhost:~$ sudo apt upgrade snapd
> [sudo] password for chris:
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> snapd is already the newest version (2.16ubuntu3).
> Calculating upgrade... Done
>
>
> > On Wed, Nov 2, 2016 at 6:40 PM, Chris <cpollock at embarqmail.com>
> > wrote:
> > > I went to remove a snap, viking-gps, and it just sat there doing
> > > nothing. I did a CTRL-C to stop the process. So, running snap
> > > changes
> > > showed me
> > >
> > > 343  Doing   2016-11-02T17:22:13Z  -                     Remove
> > > "viking-gps" snap
> > >
> > > Then running snap change 343, since it was still running I get:
> > >
> > > chris at localhost:/snap/viking-gps/1$ snap change 343
> > > Status  Spawn                 Ready                 Summary
> > > Done    2016-11-02T17:22:13Z  2016-11-02T17:22:14Z  Stop snap
> > > "viking-
> > > gps" services
> > > Done    2016-11-02T17:22:13Z  2016-11-02T17:22:16Z  Make snap
> > > "viking-
> > > gps" unavailable to the system
> > > Done    2016-11-02T17:22:13Z  2016-11-02T17:22:19Z  Remove security
> > > profile for snap "viking-gps" (1)
> > > Done    2016-11-02T17:22:13Z  2016-11-02T17:22:21Z  Remove data for
> > > snap "viking-gps" (1)
> > > Doing   2016-11-02T17:22:13Z  -                     Remove snap
> > > "viking-gps" (1) from the system
> > > Do      2016-11-02T17:22:13Z  -                     Discard
> > > interface
> > > connections for snap "viking-gps" (1)
> > >
> > > ...................................................................
> > > ...
> > > Remove snap "viking-gps" (1) from the system
> > >
> > > 2016-11-02T14:47:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T14:50:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T14:53:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T14:56:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T14:59:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T15:02:01-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T15:06:47-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T15:09:49-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T15:12:50-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > > 2016-11-02T15:15:51-05:00 ERROR cannot remove snap file "viking-
> > > gps",
> > > will retry in 3 mins: umount: /snap/viking-gps/1: not mounted
> > >
> > > The above tells me that all has been done except removing the snap
> > > and
> > > discarding the interface. I ran sudo snap abort 343 which stopped
> > > it.
> > > However the snap still showed up in /snap but was empty. I took a
> > > drastic step and just rmdir the folder under viking-gps and viking-
> > > gps
> > > itself. When I run sudo snap list it still shows up.
> > >
> > > chris at localhost:/snap$ sudo snap list
> > > Name                 Version         Rev  Developer    Notes
> > > blender-tpaw         2.78-tpaw0      2    tpaw         -
> > > directpdf            0.1.4           8    normex       devmode
> > > krita                3.0.1.1-snap16  8    krita        -
> > > pencilsheep          5               5    pencilsheep  -
> > > snapweb              0.21.2          24   canonical    -
> > > speed-test           1.7.0.1         2    bartaz       -
> > > ubuntu-core          16.04.1         423  canonical    -
> > > vice-jz              2.4.27-2        4    jz           -
> > > viking-
> > > gps                           1    chihchun     disabled,broken
> > > wallpaperdownloader  2.3             5    egarcia      -
> > >
> > > What snap command do I use to totally remove it from the list of
> > > snaps
> > > on my system?
> > >
> > > --
> > > Chris
> > > KeyID 0xE372A7DA98E6705C
> > > 31.11972; -97.90167 (Elev. 1092 ft)
> > > 15:14:05 up 8 min, 1 user, load average: 4.82, 4.76, 2.53
> > > Ubuntu 16.04.1 LTS, kernel 4.4.0-45-generic #66-Ubuntu SMP Wed Oct
> > > 19 14:12:37 UTC 2016
> > >
> > > --
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> > > Snapcraft at lists.snapcraft.io
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> > > /listinfo/snapcraft
> > >
> >
> >
> > --
> >
> > gustavo @ http://niemeyer.net
> > --
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> > istinfo/snapcraft
> --
> Chris
> KeyID 0xE372A7DA98E6705C
> 31.11972; -97.90167 (Elev. 1092 ft)
> 16:35:27 up 1:29, 1 user, load average: 0.07, 0.11, 0.10
> Ubuntu 16.04.1 LTS, kernel 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19
> 14:12:37 UTC 2016
>
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>


-- 

gustavo @ http://niemeyer.net
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