Problem removing a snap

Gustavo Niemeyer gustavo at niemeyer.net
Wed Nov 2 22:40:41 UTC 2016


There's no need to attempt to remove again. snapd has proper state tracking
and still remembers that you are trying to remove that snap.

If you kept the directory mounted as suggested, by now it should already be
gone.


On Wed, Nov 2, 2016 at 8:34 PM, Chris <cpollock at embarqmail.com> wrote:

> On Wed, 2016-11-02 at 20:06 -0200, Gustavo Niemeyer wrote:
> > 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.
> >
> >
> chris at localhost:~$ sudo mount --bind /snap/ubuntu-core/current
> /snap/viking-gps/1
> [sudo] password for chris:
> mount: mount point /snap/viking-gps/1 does not exist
>
> chris at localhost:~$ sudo snap remove viking-gps
> 2016-11-02T17:22:05-05:00 ERROR cannot remove snap file "viking-gps",
> will retry in 3 mins: umount: /snap/viking-gps/1: mountpoint not found
>
> The above is probably because I manually removed the empty 1 directory
> and the viking-gps directory from /snap.
>
> In an attempt to reinstall it and then hopefully have it properly
> removed I tried
>
> error: cannot install "viking-gps": snap "viking-gps" already installed
>
> From what I can see when I run snap list and it's still shown there
> needs to be some kind of refresh command (other than the one to check
> for newer snap versions) which would refresh the listing of snaps or
> tell snapd that a snap is no longer there.
>
> > 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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> > > > > Modify settings or unsubscribe at: https://lists.ubuntu.com/mai
> > > lman
> > > > > /listinfo/snapcraft
> > > > >
> > > >
> > > >
> > > > --
> > > >
> > > > gustavo @ http://niemeyer.net
> > > > --
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> > > an/l
> > > > 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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> > istinfo/snapcraft
> --
> Chris
> KeyID 0xE372A7DA98E6705C
> 31.11972; -97.90167 (Elev. 1092 ft)
> 17:14:37 up 2:08, 1 user, load average: 0.47, 0.46, 0.36
> 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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