Mirror sync in progress

[J-P Nurmi]

Installation failed because fi.archive.ubuntu.com/ubuntu was being synced. The mirror candidates were fi.archive.ubuntu.com/ubuntu and http://archive.ubuntu.com/ubuntu.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: subiquity (unknown)
ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6
Uname: Linux 6.1.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.26.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.480
CurtinAptConfig: /var/log/installer/subiquity-curtin-apt.conf
Date: Wed Mar 22 09:42:01 2023
ExecutablePath: /snap/ubuntu-desktop-installer/876/bin/subiquity/subiquity/cmd/server.py
InterpreterPath: /snap/ubuntu-desktop-installer/876/usr/bin/python3.10
LiveMediaBuild: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230322)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd QEMU USB Tablet
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Lsusb-t:
 /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 5000M
 /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
     |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 480M
MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
ProcAttrCurrent: snap.hostname-desktop-installer.subiquity-server (complain)
ProcCmdline: /snap/hostname-desktop-installer/876/usr/bin/python3.10 -m subiquity.cmd.server --use-os-prober --storage-version=2 --postinst-hooks-dir=/snap/hostname-desktop-installer/876/etc/subiquity/postinst.d
ProcEnviron:
 LANG=C.UTF-8
 LD_LIBRARY_PATH=<set>
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz layerfs-path=minimal.standard.live.squashfs --- quiet splash
Python3Details: /usr/bin/python3.11, Python 3.11.2, python3-minimal, 3.11.2-1
PythonDetails: N/A
SnapChannel:

SnapRevision: 876
SnapUpdated: False
SnapVersion: 0+git.e763f753
SourcePackage: subiquity
Title: install failed crashed with CalledProcessError
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.release: 0.0
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.16.0-debian-1.16.0-5
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-q35-7.2
dmi.modalias: dmi:bvnSeaBIOS:bvr1.16.0-debian-1.16.0-5:bd04/01/2014:br0.0:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-7.2:cvnQEMU:ct1:cvrpc-q35-7.2:sku:
dmi.product.name: Standard PC (Q35 + ICH9, 2009)
dmi.product.version: pc-q35-7.2
dmi.sys.vendor: QEMU

[Olivier Gayot (ogayot)]

Looks like the minimal downloads we do during mirror checking are not enough when the mirror is syncing. That's a real concern.

[Michael Hudson-Doyle (mwhudson)]

any kind of preflight mirror check is of course a kind of toctou. These "mirror sync in progress?" issues _really_ should not by happening with by-hash package lists which have been a thing since uh. Xenial? A while anyway. Is there something unique about the fi and se mirrors that they are uniquely problematic?