I have also contacted the host provider about this. And I was probably very correct in my assumption. We suspect that it is due to the very outdated kernel on the host system, which is shared with a modern Ubuntu 22.04 operating system on openvz.
hostnamectl
Virtualization: openvz
Kernel: Linux...
I was just able to reproduce it this way too, so the task limit doesn't seem to be the problem:
After that it worked again on 2 attempts. Is it possible that Plesk sometimes does something in the background and if an update takes place during this time, that it then hangs? Cronjobs or...
Unfortunately there is nothing to be found anywhere. These are the first entries from the log. I don't understand it either. But the problem is reproducible after every Plesk update, which I install myself via https://example.com:8447/installer/summary.html.
The other user here had the same...
But I'm not entirely sure whether this is the solution to the problem. As there was a real loop when restarting the service tonight.
Ps. Too bad you can only edit here for 4 minutes, that's a bit short.
journalctl -u sw-engine -n 100 --no-pager
Analysis Commands
cat /proc/sys/kernel/pid_max
→ Shows the maximum number of process IDs (PIDs) available system-wide.
Output: 4194304
This is a very high limit, meaning the system allows up to 4.19 million simultaneous tasks.
It’s a kernel-level setting and not a practical limit for...
It seems to have something to do with the cgroup limits? I still have the error with Plesk updates.
https://talk.plesk.com/threads/plesk-backend-often-not-accessible-when-installing-updates-manually.378687/
What I then see is that the sw-engine.service is not running (in the repair kit). Does this take longer after an update until it starts again? Even hours? This has not yet been observed with automatic updates.
Hello, when I install a Plesk update manually and the installation is completed successfully, I can access my websites normally. But when I try to log in to the Plesk backend, I usually get an error message when I call up the login page and it is recommended to use the repair kit. If you then...