Package: apt-cacher-ng
Version: 3.7.4-1

Dear Maintainer,

With the above version of apt-cacher-ng we encounter a bug while installing
packages. (In our scenario the apt-cacher-ng itself runs in a Docker image
based on ubuntu:jammy-20230126 (22.04 LTS)).

The below error message happens for many packages (below is a more complete
log):

E: Failed to fetch
http://archive.ubuntu.com/ubuntu/pool/main/a/automake-1.16/automake_1.16.1-4
ubuntu6_all.deb  503  Connection closed, check DlMaxRetries [IP: x.x.x.x
3142]

This occurs reproducibly in scenarios where many packages will be installed
at a time (in our case while building docker images). This behaviour is not
100% reproducible and might not occur if only a low number of packages is
being installed. It also sometimes works without issues for a large number
of packages. But most of the times starts failing after 40-60 packages.

The only reliable workaround we found was "downgrading" the apt-cacher-ng
version to 3.6.4 (based on Debian 11, docker image
debian:bullseye-20230208). There is also an open bug report on the ubuntu
bug tracker:
https://bugs.launchpad.net/ubuntu/+source/apt-cacher-ng/+bug/1960264 but it
does not only occur with PPAs, but also regular repositories.

Below is the more detailed log for a situation with a low amount of packages
being installed.

[...]
0 upgraded, 63 newly installed, 0 to remove and 4 not upgraded.
Need to get 26.7 MB of archives.
After this operation, 133 MB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssl1.1
amd64 1.1.1f-1ubuntu2.17 [1322 kB]
Get:2 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libpython3.8-minimal amd64 3.8.10-0ubuntu1~20.04.6 [717 kB]
Get:3 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libexpat1
amd64 2.2.9-1ubuntu0.6 [74.6 kB]
Get:4 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
python3.8-minimal amd64 3.8.10-0ubuntu1~20.04.6 [1901 kB]
Get:5 http://archive.ubuntu.com/ubuntu focal/main amd64 python3-minimal
amd64 3.8.2-0ubuntu2 [23.6 kB]
Get:6 http://archive.ubuntu.com/ubuntu focal/main amd64 mime-support all
3.64ubuntu1 [30.6 kB]
Get:7 http://archive.ubuntu.com/ubuntu focal/main amd64 libmpdec2 amd64
2.4.2-3 [81.1 kB]
Get:8 http://archive.ubuntu.com/ubuntu focal/main amd64 readline-common all
8.0-4 [53.5 kB]
Get:9 http://archive.ubuntu.com/ubuntu focal/main amd64 libreadline8 amd64
8.0-4 [131 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libsqlite3-0 amd64 3.31.1-4ubuntu0.5 [549 kB]
Get:11 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libpython3.8-stdlib amd64 3.8.10-0ubuntu1~20.04.6 [1675 kB]
Get:12 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 python3.8
amd64 3.8.10-0ubuntu1~20.04.6 [387 kB]
Get:13 http://archive.ubuntu.com/ubuntu focal/main amd64 libpython3-stdlib
amd64 3.8.2-0ubuntu2 [7068 B]
Get:14 http://archive.ubuntu.com/ubuntu focal/main amd64 python3 amd64
3.8.2-0ubuntu2 [47.6 kB]
Get:15 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
perl-modules-5.30 all 5.30.0-9ubuntu0.3 [2739 kB]
Get:16 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm6 amd64
1.18.1-5 [27.4 kB]
Get:17 http://archive.ubuntu.com/ubuntu focal/main amd64 libgdbm-compat4
amd64 1.18.1-5 [6244 B]
Get:18 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libperl5.30
amd64 5.30.0-9ubuntu0.3 [3951 kB]
Get:19 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 perl amd64
5.30.0-9ubuntu0.3 [224 kB]
Get:20 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 openssl
amd64 1.1.1f-1ubuntu2.17 [622 kB]
Get:21 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
ca-certificates all 20211016ubuntu0.20.04.1 [141 kB]
Get:22 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
python3-pkg-resources all 45.2.0-1ubuntu0.1 [130 kB]
Get:23 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libkrb5support0 amd64 1.17-6ubuntu4.2 [31.0 kB]
Get:24 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libk5crypto3 amd64 1.17-6ubuntu4.2 [80.0 kB]
Get:25 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libkeyutils1 amd64 1.6-6ubuntu1.1 [10.3 kB]
Get:26 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libkrb5-3
amd64 1.17-6ubuntu4.2 [330 kB]
Get:27 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libgssapi-krb5-2 amd64 1.17-6ubuntu4.2 [121 kB]
Get:28 http://archive.ubuntu.com/ubuntu focal/main amd64 libpsl5 amd64
0.21.0-1ubuntu1 [51.5 kB]
Get:29 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libbrotli1
amd64 1.0.7-6ubuntu0.1 [267 kB]
Get:30 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libroken18-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [42.5 kB]
Get:31 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libasn1-8-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [181 kB]
Get:32 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libheimbase1-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [30.4 kB]
Get:33 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libhcrypto4-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [88.1 kB]
Get:34 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libwind0-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [47.7 kB]
Get:35 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libhx509-5-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [107 kB]
Get:36 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libkrb5-26-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [207 kB]
Get:37 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libheimntlm0-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [15.1 kB]
Get:38 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libgssapi3-heimdal amd64 7.7.0+dfsg-1ubuntu1.4 [96.5 kB]
Get:39 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libsasl2-modules-db amd64 2.1.27+dfsg-2ubuntu0.1 [14.7 kB]
Get:40 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libsasl2-2
amd64 2.1.27+dfsg-2ubuntu0.1 [49.3 kB]
Get:41 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libldap-common all 2.4.49+dfsg-2ubuntu1.9 [16.6 kB]
Get:42 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libldap-2.4-2 amd64 2.4.49+dfsg-2ubuntu1.9 [155 kB]
Get:43 http://archive.ubuntu.com/ubuntu focal/main amd64 libnghttp2-14 amd64
1.40.0-1build1 [78.7 kB]
Get:44 http://archive.ubuntu.com/ubuntu focal/main amd64 librtmp1 amd64
2.4+20151223.gitfa8646d.1-2build1 [54.9 kB]
Get:45 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libssh-4
amd64 0.9.3-2ubuntu2.2 [170 kB]
Get:46 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 libcurl4
amd64 7.68.0-1ubuntu2.15 [235 kB]
Get:47 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 curl amd64
7.68.0-1ubuntu2.15 [161 kB]
Get:48 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
libcurl3-gnutls amd64 7.68.0-1ubuntu2.15 [232 kB]
Get:49 http://archive.ubuntu.com/ubuntu focal/main amd64 liberror-perl all
0.17029-1 [26.5 kB]
Get:50 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git-man all
1:2.25.1-1ubuntu3.8 [886 kB]
Get:51 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 git amd64
1:2.25.1-1ubuntu3.8 [4538 kB]
Err:52 http://archive.ubuntu.com/ubuntu focal/main amd64 libassuan0 amd64
2.5.3-7ubuntu2
  503  Connection closed, check DlMaxRetries [IP: x.x.x.x 3142]
Ign:53 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 gpgconf
amd64 2.2.19-3ubuntu2.2
Ign:54 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 gpg amd64
2.2.19-3ubuntu2.2
Err:55 http://archive.ubuntu.com/ubuntu focal/main amd64 pinentry-curses
amd64 1.1.0-3build1
  503  Connection closed, check DlMaxRetries [IP: x.x.x.x 3142]
Err:56 http://archive.ubuntu.com/ubuntu focal/main amd64 libnpth0 amd64
1.6-1
  503  Connection closed, check DlMaxRetries [IP: x.x.x.x 3142]
Ign:57 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 gpg-agent
amd64 2.2.19-3ubuntu2.2
Get:58 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64
python-pip-whl all 20.0.2-5ubuntu1.7 [1805 kB]
Ign:59 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
python3-lib2to3 all 3.8.10-0ubuntu1~20.04
Ign:60 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
python3-distutils all 3.8.10-0ubuntu1~20.04
Get:61 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
python3-setuptools all 45.2.0-1ubuntu0.1 [330 kB]
Get:62 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64
python3-wheel all 0.34.2-1ubuntu0.1 [23.9 kB]
Get:63 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64
python3-pip all 20.0.2-5ubuntu1.7 [230 kB]
Get:53 http://security.ubuntu.com/ubuntu focal-updates/main amd64 gpgconf
amd64 2.2.19-3ubuntu2.2 [124 kB]
Get:54 http://security.ubuntu.com/ubuntu focal-updates/main amd64 gpg amd64
2.2.19-3ubuntu2.2 [482 kB]
Get:57 http://security.ubuntu.com/ubuntu focal-updates/main amd64 gpg-agent
amd64 2.2.19-3ubuntu2.2 [232 kB]
Get:59 http://security.ubuntu.com/ubuntu focal-updates/main amd64
python3-lib2to3 all 3.8.10-0ubuntu1~20.04 [76.3 kB]
Get:60 http://security.ubuntu.com/ubuntu focal-updates/main amd64
python3-distutils all 3.8.10-0ubuntu1~20.04 [141 kB]
Fetched 26.6 MB in 1s (19.6 MB/s)
E: Failed to fetch
http://archive.ubuntu.com/ubuntu/pool/main/liba/libassuan/libassuan0_2.5.3-7
ubuntu2_amd64.deb  503  Connection closed, check DlMaxRetries [IP: x.x.x.x
3142]
E: Failed to fetch
http://archive.ubuntu.com/ubuntu/pool/main/p/pinentry/pinentry-curses_1.1.0-
3build1_amd64.deb  503  Connection closed, check DlMaxRetries [IP: x.x.x.x
3142]
E: Failed to fetch
http://archive.ubuntu.com/ubuntu/pool/main/n/npth/libnpth0_1.6-1_amd64.deb
503  Connection closed, check DlMaxRetries [IP: x.x.x.x 3142]
E: Unable to fetch some archives, maybe run apt-get update or try with
--fix-missing?

Attachment: smime.p7s
Description: S/MIME cryptographic signature

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