Centralized Monitoring: No statistics displayed (“N/A”) for all servers

Issue

The Centralized Monitoring dashboard in the CLN console is not displaying the statistics:

• Historical graphs and real-time alerts stop updating, every metric column shows “N/A ** (Your server was added a while ago and there is no data yet. Or there is no data for the server for the last 30 days.)”

• The service `cl_plus_sender` is active and reports errors from `lve-stats`. Restart makes no change.

# service cl_plus_sender status
Redirecting to /bin/systemctl status cl_plus_sender.service
● cl_plus_sender.service - CL+ sender service
Loaded: loaded (/etc/systemd/system/cl_plus_sender.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2025-02-28 00:31:20 UTC; 2 months 15 days ago
****
Debug info for request:
N/A
May 14 04:20:14 lve-stats[1511428]: (CL+_sender_daemon) [ERROR] Sending retries over, still no success: HTTPSConnectionPool(host='cm.cloudlinux.com', port=443):>
May 14 04:20:14 lve-stats[1511428]: (CL+_sender_daemon) [ERROR] es_sender error while requesting cm.cloudlinux.com: HTTPSConnectionPool(host='cm.cloudlinux.com'>

Environment

• Centralized Monitoring Dashboard
• CLN
• CloudLinux OS

Solution

The reason has been identified, and the fix has been deployed.

Cause

CLPRO-2731.