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Description of problem:

dnf will fail when it comes to a repository which has a .zck (zchunk) file in its metadata. While this should only occur for Fedora30+ repos, it can occur in other ones. The version of dnf in 8.0 does not fail when it sees a file like this

Version-Release number of selected component (if applicable):
dnf-4.2.6-1.el8.noarch
dnf-4.2.7-2.el8.noarch

dnf-4.0.9.2-5.el8.noarch works

How reproducible:
100%

Steps to Reproduce:
1. install RHEL-8.1
2. download and install epel-release from dl.fedoraproject.org/pub/epel/
3. yum update

Actual results:

[root@rhel8-1 log]# yum update
Updating Subscription Management repositories.
Extra Packages for Enterprise Linux 8 - x86_64                                                                26 kB/s |  16 kB     00:00    
failed to open: /var/cache/dnf/epel-fafd94c310c51e1e/repodata/40b4c616fff77d0865d318d14dbd46da0906f3a9c1a1de521a7f57d2109a4d4d-updateinfo.xml.zck


Expected results:


Additional info:

*** This bug has been marked as a duplicate of bug 1719830 ***