Various actions fail in Plesk: Cannot connect to the task manager

Symptoms

• An operation in Plesk fails with the error message:

  PLESK_ERROR: Cannot connect to the task manager (plesk-task-manager service might not be running): No such file or directory

• Plesk Task Manager service is in the "Activating" status:

  # service plesk-task-manager status | grep Active
  
  Active: activating (auto-restart) (Result: exit-code) since Wed 2025-02-26 06:50:18 UTC; 1s ago

• The following error messages may be logged in:

  • /var/log/plesk/task-manager.log

    CONFIG_TEXT: ERROR Failed to update DB schema: unable to open database file: permission denied

  • journalctl

    # journalctl | grep plesk-task-manager
    Nov 27 08:12:10 example.plesk.page plesk-task-manager[1022672]: 2024/11/27 08:12:10 Cannot open '/var/log/plesk/task-manager.log' log for writing: open /var/log/plesk/task-manager.log: permission denied

Cause

Plesk Task Manager installation files have incorrect ownership.

Resolution

1. Connect to your Plesk server via SSH.

2. Set correct permissions for Plesk Task Manager directory and subdirectories recursively:

   # chown -R psaadm:psaadm /var/lib/plesk/task-manager/

3. Set correct permissions for Plesk Task Manager log:

   # chown -R psaadm:psaadm /var/log/plesk/task-manager.log

   # chmod 0640 /var/log/plesk/task-manager.log

4. Restart plesk-task-manager service:

   # service plesk-task-manager restart

5. Verify that the service is active now:

   # service plesk-task-manager status | grep Active
   
   Active: active (running) since Wed 2025-02-26 07:03:09 UTC; 8s ago