Device or resource busy error while building image for UEFI through DIB

[Aayush Rajoria]

I have attached 32 loop devices and exhausted 9 of them , while building image through DIB element getting error Device or resource busy. Attached are the logs:

(uefi) stack@ubuntu:~/diskimage-builder$ disk-image-create -a amd64 -o ubuntu-amd64-uefi.qcow2 vm dhcp-all-interfaces ubuntu
Building elements: base vm dhcp-all-interfaces ubuntu
Expanded element dependencies to: dib-python install-types dib-run-parts vm manifests dib-init-system cache-url pkg-map base ubuntu cloud-init-datasources bootloader dhcp-all-interfaces package-installs dpkg dkms
Building in /tmp/image.8ewEfAgq

....

dib-run-parts Wed Mar 30 12:48:04 UTC 2016 97-dkms completed
----------------------- PROFILING -----------------------

Target: post-install.d

Script Seconds
--------------------------------------- ----------

00-package-installs 0.034
10-enable-init-scripts 0.003
95-package-uninstalls 0.036
97-dkms 0.055

--------------------- END PROFILING ---------------------
Unmount /tmp/image.8ewEfAgq/mnt/var/cache/apt/archives
Unmount /tmp/image.8ewEfAgq/mnt/tmp/ccache
Unmount /tmp/image.8ewEfAgq/mnt/sys
Unmount /tmp/image.8ewEfAgq/mnt/proc
Unmount /tmp/image.8ewEfAgq/mnt/dev/pts
Unmount /tmp/image.8ewEfAgq/mnt/dev
dib-run-parts Wed Mar 30 12:48:05 UTC 2016 Running /tmp/image.8ewEfAgq/hooks/block-device.d/10-partition
dib-run-parts Wed Mar 30 12:48:05 UTC 2016 10-partition completed
mkfs.fat 3.0.26 (2014-03-07)
unable to get drive geometry, using default 255/63
IMAGE_BLOCK_DEVICE=/dev/loop10p1
----------------------- PROFILING -----------------------

Target: block-device.d

Script Seconds
--------------------------------------- ----------

10-partition 0.099

--------------------- END PROFILING ---------------------

.....

Creating config file /etc/default/grub with new version
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.13.0-83-generic
Found initrd image: /boot/initrd.img-3.13.0-83-generic
done
Setting up grub-efi (2.02~beta2-9ubuntu1.7) ...
Processing triggers for libc-bin (2.19-0ubuntu6.7) ...
+ mkdir -p /boot/efi
+ mount /dev/loop20p1 /boot/efi
mount: special device /dev/loop20p1 does not exist
Unmount /tmp/image.8ewEfAgq/mnt/tmp/in_target.d
Unmount /tmp/image.8ewEfAgq/mnt/sys
Unmount /tmp/image.8ewEfAgq/mnt/proc
Unmount /tmp/image.8ewEfAgq/mnt/dev/pts
Unmount /tmp/image.8ewEfAgq/mnt/dev
Unmount /tmp/image.8ewEfAgq/mnt
umount2: Device or resource busy
umount: /tmp/image.iAaljMBK: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
umount2: Device or resource busy
rm: cannot remove '/tmp/image.iAaljMBK': Device or resource busy

[Clint Byrum (clint-fewbar)]

I was unable to reproduce with latest trunk

commit 95c874abb98b4f9b4dab085be1be6c5c1909656d
Merge: 9a00bf1 eb99fe7
Author: Jenkins <email address hidden>
Date: Wed May 18 19:39:10 2016 +0000

    Merge "Add dhcp-all-interfaces.target for syncing units"

[Launchpad Janitor (janitor)]

[Expired for diskimage-builder because there has been no activity for 60 days.]