This bug was fixed in the package unattended-upgrades -
1.1ubuntu1.18.04.1
---------------
unattended-upgrades (1.1ubuntu1.18.04.1) bionic; urgency=medium
[ Michael Vogt ]
* unattended-upgrades: fix Unlocked context manager. (LP: #1602536)
The Unlocked context manager did correctly unlock but did not
reacquire the lock which means that in minimal-upgrade step
mode it is possible to run apt code without a lock. If something
else (like landscape, apt, synaptic, packagekit) locks the cache
in the meantime this will work and u-u will get dpkg errors
because dpkg will not be able to perform its operations. It is
less of an issue in non-minimal mode, but even then the auto-remove
step may fail in this way.
[ Balint Reczey ]
* Fix adjusting candidates (LP: #1775292)
* Relock apt lock before reopening the cache (LP: #1602536)
* Fix crashing while adjusting candidates and save candidates to adjust only
in first sweep run, not emptying the set later
(Closes: #901258) (LP: #1775307)
-- Balint Reczey <rbal...@ubuntu.com> Wed, 06 Jun 2018 16:30:55 -0700
** Changed in: unattended-upgrades (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1602536
Title:
/usr/bin/unattended-upgrade:apt.cache.LockFailedException:/usr/bin
/unattended-
upgrade@1468:main:do_auto_remove:cache_commit:commit:_fetch_archives
Status in python-apt package in Ubuntu:
Fix Committed
Status in unattended-upgrades package in Ubuntu:
Fix Released
Status in python-apt source package in Xenial:
New
Status in unattended-upgrades source package in Xenial:
New
Status in python-apt source package in Bionic:
New
Status in unattended-upgrades source package in Bionic:
Fix Released
Bug description:
[Impact]
* Unattended-upgrades fails to autoremove packages after installing
updates or fails to install updates due to a parallel process
acquiring apt or dpkg lock while u-u is running.
[Test Case]
* Set up a system with packages (> 30) to be upgraded. In case of
Bionic -security has a low number of updates, thus set up the system
to install -updates to have more packages for u-u to upgrade:
echo 'Unattended-Upgrade::Allowed-Origins::
"${distro_id}:${distro_codename}-updates";' >
/etc/apt/apt.conf.d/51-updates
* Set up two shells to run commands in parallel
* In shell "A" run sudo apt update && sudo unattended-upgrade --dry-run
--verbose --debug
* After u-u started run the following command in shell "B":
while sleep 1; do python3 -c 'import apt; import apt_pkg;
print(apt_pkg.pkgsystem_lock())' ; done
* Observe the following exception repeated while running u-u and True being
printed after u-u is finished:
...
Traceback (most recent call last):
File "<string>", line 1, in <module>
apt_pkg.Error: E:Could not get lock /var/lib/dpkg/lock - open (11: Resource
temporarily unavailable), E:Unable to lock the administration directory
(/var/lib/dpkg/), is another process using it?
Traceback (most recent call last):
File "<string>", line 1, in <module>
apt_pkg.Error: E:Could not get lock /var/lib/dpkg/lock - open (11: Resource
temporarily unavailable), E:Unable to lock the administration directory
(/var/lib/dpkg/), is another process using it?
True
Traceback (most recent call last):
File "<string>", line 1, in <module>
apt_pkg.Error: E:Could not get lock /var/lib/dpkg/lock - open (11: Resource
temporarily unavailable), E:Unable to lock the administration directory
(/var/lib/dpkg/), is another process using it?
True
True
True
True
...
[Regression Potential WIP]
* Unattended-upgrade may crash
[Other Info]
It looks like python-apt also releases the lock sometimes unexpectedly
thus the both packages need to be fixed to avoid loosing the lock.
[Original Bug Text]
The Ubuntu Error Tracker has been receiving reports about a problem
regarding unattended-upgrades. This problem was most recently seen
with version 0.90, the problem page at
https://errors.ubuntu.com/problem/19f99745d7dce5aea118eb31bfffcbdcdf238c4f
contains more details.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1602536/+subscriptions
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