System services fail to start on a Plesk server: Failed to activate service 'org.freedesktop.systemd1': timed out

Symptoms

• Unable to connect to FTP. The following error is shown in a FTP client:

  Error: Failed to retrieve directory listing
  Error: Connection timed out after 20 seconds of inactivity 
  Error: Could not connect to server

• The issue occurs intermittently. Only sometimes a FTP connection works
• Plesk File Manager is loading very slow
• Websites and webmailer are not accessible with "502 Bad Gateway" error

• Attempts to start systemd-logind service or other services fail with a similar error message:

  # systemctl start systemd-logind.service
  Job for systemd-logind.service failed. See 'systemctl status systemd-logind.service' and 'journalctl -xn' for details.

• The following error can be observed via journalctl:

  # journalctl -u dbus
  -- Logs begin at Tue 2017-12-19 06:44:01 CET, end at Wed 2017-12-20 01:18:50 CET. -- 
  Dec 19 06:44:01 example.com dbus[695]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out

• The following error message is displayed in Plesk:

  New configuration files for the Apache web server were not created due to errors in the configuration models: Can not restart web server: INFO: Service: httpd, Action: stop Trying to stop service httpd ... WARNING! Httpd - control script does not exist or does not executable (see log file: /var/log/plesk/rc_actions.log) Continue ... INFO: Service: httpd, Action: stop Trying to stop service httpd ... WARNING! Some http: // http: // log file: /var/log/plesk/rc_actions.log) Continue ... WARNING! Some problems are found during httpd stop service (see log file: /var/log/plesk/rc_actions.log) Continue ... / usr / local / psa / admin / sbin / pleskrc execution failed: Failed to get D-Bus connection : Connection refused Failed to get D-Bus connection: Connection refused

Cause

This is a DBus bug with ID 95263 which is fixed in version 1.11.10.

Resolution