Issue Package Update Manager

[se2e-dev]

Server operating system version

Debian 12.11

Plesk version and microupdate number

18.0.71

For the past 7 days, we’ve been receiving a daily email with the subject “Package Update Manager notification” on one of our Plesk servers.

Message content:

2025-07-13 06:26:15 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
2025-07-13 06:26:53 ERROR: Apt cache fetch failed. Try to run the `apt-get update` command.
2025-07-13 06:26:53 ERROR:
2025-07-13 06:26:53 ERROR: Exited with returncode 1.

Details:
- Running apt-get update manually works without any issues or errors.
- There are no relevant log entries in either the Plesk Log Browser or the system logs at the time of the error.
- The system otherwise behaves normally and updates manually without problems.

How can we resolve this issue so that the daily error notification no longer appears? Any concrete suggestions or solutions would be greatly appreciated.

 

[scsa20]

Review and see if it's related to this: https://support.plesk.com/hc/en-us/...-failed-Try-to-run-the-apt-get-update-command

 

[se2e-dev]

Then it would have to occur on all servers. But it’s only happening on one!

 

[se2e-dev]

/var/log/plesk/install/autoinstaller3.log

[2025-07-13 06:25:01.833742] Warning: Failed to detach from parents cgroup, installer might be unexpectedly killed later by the system

The getBestBuild function has selected the build pool/PSA_18.0.71_17220/plesk-18.0.71-deb12.0-x86_64.inf3 for installation.

[2025-07-13 06:25:02.811187] Addon PHP52_17 have no build for current OS
[2025-07-13 06:25:02.811267] Addon PHP53_17 have no build for current OS
[2025-07-13 06:25:02.811859] Addon PHP71_17 have no build for current OS

Warning: ez_template_suffix is NOT defined in ...

[2025-07-13 06:25:10.988075] Component plesk/drweb: mode error
[2025-07-13 06:25:10.988167] Component plesk/sophos: mode error
[2025-07-13 06:25:10.989566] Component plesk/watchdog: mode error

No errors

 

[scsa20]

Have you tried running apt clean to clear out the downloaded cached?

 

[se2e-dev]

Yes…

apt clean
rm -rf /var/lib/apt/lists/*
apt update

And then again this morning… the mail „Package Update Manager notification“.

2025-07-14 06:26:14 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
2025-07-14 06:26:52 ERROR: Apt cache fetch failed. Try to run the `apt-get update` command.
2025-07-14 06:26:52 ERROR:
2025-07-14 06:26:52 ERROR: Exited with returncode 1.

As already mentioned, there are also no corresponding entries in the log browser (modules/log-browser/?tab=plesk)...