Arch Linux

Description: br.mirror.archlinux-br.org rate limiting results in normal system updates failing to complete.

The example bellow shows a rather large set of packages to be updated (as I've been away for a few days), but even day-to-day updates, when they are a bit larger, can show these errors.

# pacman -Syu
[ ... ]
Total ( 45/211) 9.9 MiB 9.02 MiB/s 00:01 [-----------------------------------] 100%
error: failed retrieving file 'jupyter-nbclient-0.7.0-1-any.pkg.tar.zst.sig' from br.mirror.archlinux-br.org : The requested URL returned error: 403
error: failed retrieving file 'haskell-syb-0.7.2.2-4-x86_64.pkg.tar.zst.sig' from br.mirror.archlinux-br.org : The requested URL returned error: 403
error: failed retrieving file 'haskell-blaze-markup-0.8.2.8-93-x86_64.pkg.tar.zst' from br.mirror.archlinux-br.org : The requested URL returned error: 403
warning: too many errors from br.mirror.archlinux-br.org, skipping for the remainder of this transaction
error: failed retrieving file 'ruby-json-2.6.2-2-x86_64.pkg.tar.zst.sig' from br.mirror.archlinux-br.org : The requested URL returned error: 403
warning: failed to retrieve some files
error: failed to commit transaction (unexpected error)
Errors occurred, no packages were upgraded.

While the output from pacman suggests some attempt to workaround the sudden failure of the mirror, the entire operation ends being cancelled. If the mirror is not removed from the mirrorlist, many attempts are necessary to complete the system update.

On the other hand, manually removing mirrors is not ergonomic, especially in regions where there's significant benefit in regularly (and automatically) using mirror statuses and rankmirrors to improve update times.

Additional info:
* package version(s): pacman 6.0.1-8
* mirrorlist: generated for my location, then ranked and capped at 4 (this almost always places br.mirror.archlinux-br.org at the top)
* ParallelDownloads: 4 (I normally use more, but I went as low as 4, still with no effect)

Steps to reproduce:
* set up a mirrorlist with br.mirror.archlinux-br.org at the top;
* run pacman -Syu when there are more than a handful of packages to update.