device-mapper: remove ioctl on loop0p5 failed: Device or resource busy

[Leo Arias]

Today I tried to get an image with ubuntu-device-flash, and it failed 2 times in a row. It worked on the third try.

$ sudo ubuntu-device-flash core 15.04 --channel edge --developer-mode -o ubuntu-snappy-1504-edge-amd64-generic.img
[sudo] password for elopio:
Determining oem configuration
Starting download of generic-amd64
41.70 KB / 41.70 KB [================================================================================================================================================================] 100.00 % 126.70 KB/s
Done
Starting download of icon for package
38.97 KB / 38.97 KB [================================================================================================================================================================] 100.00 % 118.05 KB/s
Done
Fetching information from server...
Downloading and setting up...
error while executing external command kpartx -ds ubuntu-snappy-1504-edge-amd64-generic.img: device-mapper: remove ioctl on loop0p5 failed: Device or resource busy
loop deleted : /dev/loop0

$ apt-cache policy ubuntu-device-flash
ubuntu-device-flash:
  Instalita: 0.30-0ubuntu1
  Kandidato: 0.30-0ubuntu1
  Version table:
 *** 0.30-0ubuntu1 0
        500 http://cr.archive.ubuntu.com/ubuntu/ wily/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.29-0ubuntu3 0
        500 http://ppa.launchpad.net/snappy-dev/tools/ubuntu/ wily/main amd64 Packages

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Leo Arias (elopio)]

Also affects snapcraft, which gets in this situation after running snapcraft run.

[Leo Arias (elopio)]

To retry I do:

sudo losetup -d /dev/loop0
sudo dmsetup remove_all
sudo kpartx -d /dev/loop0

[Leo Arias (elopio)]

Moved to https://github.com/ubuntu-core/snapcraft/issues/39