Plesk Update Manager fails on the RHEL-based OS of version 8.5: ‘NoneType’ object has no attribute ‘run_sack’

Dmitry Bystrov

1 year ago

Symptoms

Unable to update System Packages on the RHEL-based OS of version 8.5 (RHEL/CentOS/AlmaLinux) in Plesk > Tools & Settings > Update Settings > Available Updates or the corresponding email is received:

'NoneType' object has no attribute 'run_sack'
The issue does not occur on the RHEL-based OS of version 8.4.

Cause

Product issue:

#PPPM-13304 "Plesk Update Manager no longer fails with the “‘NoneType’ object has no attribute ‘run_sack’” error. We have spotted this issue in Plesk Obsidian 18.0.39 Update 1 on CentOS 8.5, AlmaLinux OS 8.5, RHEL 8.5, CloudLinux OS 8.5."

Fixed in:
- Plesk Obsidian 18 November 2021 (Linux)

Resolution

Please consider updating your server:

How to install Plesk updates

Workaround

If update is not possible for some reason you may try the following

workaround

As a workaround, apply the following hotfix:

Connect to the server via SSH
Backup the existing /usr/local/psa/admin/sbin/pum_worker file:

# cp -a /usr/local/psa/admin/sbin/pum_worker{,.bak}
Download the attached pum_worker file on the server:

# wget https://plesk.zendesk.com/hc/article_attachments/12387464256023/pum_worker
Replace the old file with the downloaded one:

# yes | cp -f pum_worker /usr/local/psa/admin/sbin/pum_worker && chmod 750 /usr/local/psa/admin/sbin/pum_worker

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