The problem is that the %preuninstall of iscsi-initiator-utils wants do disable the iscsiuio.socket and iscsiuio.service that are already deleted before in the rpm transactions
This can be seen using 'sudo rpm -evvh iscsi-initiator-utils iscsi-initiator-utils-iscsiuio'

Reproducer to simulate the uninstall process:
- sudo yum install iscsi-initiator-utils
- sudo systemctl --no-reload disable iscsiuio.service iscsiuio.socket
Removed symlink /etc/systemd/system/sockets.target.wants/iscsiuio.socket.
- sudo rm -vf /usr/lib/systemd/system/iscsiuio.*
removed ‘/usr/lib/systemd/system/iscsiuio.service’
removed ‘/usr/lib/systemd/system/iscsiuio.socket’
- sudo systemctl --no-reload disable iscsi.service iscsi-onboot.service iscsi-shutdown.service iscsid.service iscsiuio.service iscsid.socket iscsiuio.socket
Failed to execute operation: Access denied

The Fix is to remove it iscsiuio.service and iscsiuio.socket from disable the command in the %preuninstall of iscsi-initiator-utils
- sudo systemctl --no-reload disable iscsi.service iscsi-onboot.service iscsi-shutdown.service iscsid.service iscsid.socket


In RHEL8.1 the same bug is present, but it is hidden because the rpm transaction does first the uninstall of  iscsi-initiator-utils befiore  iscsi-initiator-utils-scsiuio

Red Hat Enterprise Linux 7 shipped it's final minor release on September 29th, 2020. 7.9 was the last minor releases scheduled for RHEL 7.
From intial triage it does not appear the remaining Bugzillas meet the inclusion criteria for Maintenance Phase 2 and will now be closed. 

From the RHEL life cycle page:
https://access.redhat.com/support/policy/updates/errata#Maintenance_Support_2_Phase
"During Maintenance Support 2 Phase for Red Hat Enterprise Linux version 7,Red Hat defined Critical and Important impact Security Advisories (RHSAs) and selected (at Red Hat discretion) Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available."

If this BZ was closed in error and meets the above criteria please re-open it flag for 7.9.z, provide suitable business and technical justifications, and follow the process for Accelerated Fixes:
https://source.redhat.com/groups/public/pnt-cxno/pnt_customer_experience_and_operations_wiki/support_delivery_accelerated_fix_release_handbook  

Feature Requests can re-opened and moved to RHEL 8 if the desired functionality is not already present in the product. 

Please reach out to the applicable Product Experience Engineer[0] if you have any questions or concerns.  

[0] https://bugzilla.redhat.com/page.cgi?id=agile_component_mapping.html&product=Red+Hat+Enterprise+Linux+7

This does not seem to be an issue anymore on RHEL-8 and RHEL-9.

(In reply to Peter Vreman from comment #2)
> In RHEL8.1 the same bug is present, but it is hidden because the rpm
> transaction does first the uninstall of  iscsi-initiator-utils befiore 
> iscsi-initiator-utils-scsiuio

When running `rpm -evvh iscsi-initiator-utils-iscsiuio iscsi-initiator-utils`, the iscsiuio's %preun script is being run first and iscsi-initiator-utils's disable command looks fine. I was not able to reproduce dangling systemd unit files - am I missing something?

On RHEL8.4 the rpm scripts are still not correct, the script in iscsi-initiator-utils still contains the iscsiuio.service iscsiuio.socket in its disable line, but it does not own the files.

But on RHEL8.4 the systemd command is more tolerant on the disbale that it ignores items not existing.

~~~
vrempet-admin@li-lc-2442 ~
$ sudo yum install iscsi-initiator-utils
Updating Subscription Management repositories.
HOICI-3.0.99-ci                                                                                                               26 kB/s | 2.1 kB     00:00
Red Hat Enterprise Linux 8 for x86_64 - SAP NetWeaver - Extended Update Support (RPMs)                                        30 kB/s | 2.3 kB     00:00
HOIOS-8.4.99-ci                                                                                                               29 kB/s | 2.1 kB     00:00
HOIPRODUCTS-3.0.99-ci                                                                                                         26 kB/s | 2.1 kB     00:00
Red Hat CodeReady Linux Builder for RHEL 8 x86_64 - Extended Update Support (RPMs)                                            38 kB/s | 2.8 kB     00:00
Red Hat Enterprise Linux 8 for x86_64 - BaseOS - Extended Update Support (RPMs)                                               31 kB/s | 2.4 kB     00:00
Red Hat Enterprise Linux 8 for x86_64 - AppStream - Extended Update Support (RPMs)                                            37 kB/s | 2.8 kB     00:00
Red Hat Satellite Tools 6.9 for RHEL 8 x86_64 (RPMs)                                                                          25 kB/s | 2.1 kB     00:00
HOIRHEL-8.4-d20210919                                                                                                         23 kB/s | 2.1 kB     00:00
Dependencies resolved.
=============================================================================================================================================================
 Package                                     Architecture        Version                                Repository                                      Size
=============================================================================================================================================================
Installing:
 iscsi-initiator-utils                       x86_64              6.2.1.2-1.gita8fcb37.el8               rhel-8-for-x86_64-baseos-eus-rpms              379 k
Installing dependencies:
 iscsi-initiator-utils-iscsiuio              x86_64              6.2.1.2-1.gita8fcb37.el8               rhel-8-for-x86_64-baseos-eus-rpms              100 k

Transaction Summary
=============================================================================================================================================================
Install  2 Packages
...
Installed:
  iscsi-initiator-utils-6.2.1.2-1.gita8fcb37.el8.x86_64                    iscsi-initiator-utils-iscsiuio-6.2.1.2-1.gita8fcb37.el8.x86_64

Complete!

vrempet-admin@li-lc-2442 ~
$ sudo systemctl --no-reload disable iscsiuio.service iscsiuio.socket
Removed /etc/systemd/system/sockets.target.wants/iscsiuio.socket.

vrempet-admin@li-lc-2442 ~
$ sudo rm -vf /usr/lib/systemd/system/iscsiuio.*
removed '/usr/lib/systemd/system/iscsiuio.service'
removed '/usr/lib/systemd/system/iscsiuio.socket'

vrempet-admin@li-lc-2442 ~
$ sudo systemctl --no-reload disable iscsi.service iscsi-onboot.service iscsi-shutdown.service iscsid.service iscsiuio.service iscsid.socket iscsiuio.socket
Removed /etc/systemd/system/sysinit.target.wants/iscsi-onboot.service.
Removed /etc/systemd/system/sockets.target.wants/iscsid.socket.
Removed /etc/systemd/system/remote-fs.target.wants/iscsi.service.

vrempet-admin@li-lc-2442 ~
$
~~~


Although the rpm scripts are not perfect it works on RHEL8.4.
If you want you can therefor close it with CURRENTRELEASE

Thanks Peter!

Chris, please see comment#14.
I see you've already fixed it in upstream https://src.fedoraproject.org/rpms/iscsi-initiator-utils/c/c055794bdad05bd5c9ea9f1757440a8fd837cf52 and RHEL-9.
Do you want to pull that change to rhel-8 as well or close this bz?

(In reply to Martin Hoyer from comment #15)
> Thanks Peter!
> 
> Chris, please see comment#14.
> I see you've already fixed it in upstream
> https://src.fedoraproject.org/rpms/iscsi-initiator-utils/c/
> c055794bdad05bd5c9ea9f1757440a8fd837cf52 and RHEL-9.
> Do you want to pull that change to rhel-8 as well or close this bz?

I'll get this fixed in the next RHEL 8 build.

Just did a quick check over the various branches, I think 7.9.z should actually have a fix as of 6.2.0.874-19 it just wasn't tracked to this BZ.  

RHEL 9 looks good, I just need to fix the mistake in the RHEL 8 spec file.

(In reply to Chris Leech from comment #16)
> I'll get this fixed in the next RHEL 8 build.
> 
> Just did a quick check over the various branches, I think 7.9.z should
> actually have a fix as of 6.2.0.874-19 it just wasn't tracked to this BZ.  
> 
> RHEL 9 looks good, I just need to fix the mistake in the RHEL 8 spec file.

Hey Chris,
Just bumping this in case this bz was forgotten. 
Looking at 6.2.1.4-4.git095f59c.el8 specfile, it's still there.

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