Please ignore Chris (well, do upgrade though, 20.10 is oooold, it hasn't
seen security updates in months)
I understand your report, I only implemented lock waiting for the dpkg
lock, not for the list lock that update holds.
Note that apt-get generally doesn't wait for the lock, only apt does
(you can pass/set options to make apt-get behave the same).
I'm not sure update lock waiting is necessary - there's little point in
running update again if you are already updating. It makes sense for
install, because you might just want to schedule two installs.
OTOH, I can see you writing a script that does update and install, and
which breaks because apt-daily.service is running in the background.
** Changed in: apt (Ubuntu)
Status: Invalid => Triaged
** Changed in: apt (Ubuntu)
Importance: Undecided => Wishlist
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https://bugs.launchpad.net/bugs/1939665
Title:
"apt-get update" fails if another instance is running
Status in apt package in Ubuntu:
Triaged
Bug description:
This snippet:
sudo apt-get update & sudo apt-get update & wait; wait
will result in one apt-get run succeeding and the other failing on the
lock:
[1] 3006473
[2] 3006474
Hit:1 http://ports.ubuntu.com/ubuntu-ports groovy InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports groovy-backports InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports groovy-security InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports groovy-updates InRelease
Reading package lists... Done
E: Could not get lock /var/lib/apt/lists/lock. It is held by process 3006476
(apt-get)
N: Be aware that removing the lock file is not a solution and may break your
system.
E: Unable to lock directory /var/lib/apt/lists/
Reading package lists... Done
[1]- Done sudo apt-get update
[2]+ Exit 100 sudo apt-get update
Note that apt-get upgrade will correctly wait.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: apt 2.1.10ubuntu0.3
ProcVersionSignature: Ubuntu 5.8.0-48.54-generic 5.8.18
Uname: Linux 5.8.0-48-generic aarch64
ApportVersion: 2.20.11-0ubuntu50.7
Architecture: arm64
CasperMD5CheckResult: skip
Date: Thu Aug 12 07:50:16 2021
ProcEnviron:
LC_TIME=C.UTF-8
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SHELL=/bin/bash
SourcePackage: apt
UpgradeStatus: Upgraded to groovy on 2021-03-25 (139 days ago)
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