The error message CL+_sender_daemon Sending retries over Connection aborted is associated with the CloudLinux CLN (CloudLinux Network) service. This service is responsible for managing licenses and updates for CloudLinux servers.

This error message suggests that there might be an issue with the network connection between your server and the CloudLinux licensing server. Here are steps you can take to address this issue:

1. Check Network Connectivity:

   • Ensure that your server has a stable and active internet connection. You can try pinging external servers to verify connectivity.

2. Verify DNS Settings:

   • Confirm that your server has correctly configured DNS servers. DNS resolution issues can cause problems with reaching external servers.

3. Firewall and Proxy:

   • Check if there are any firewall rules or proxy configurations that might be blocking or interfering with outgoing connections to the CloudLinux licensing servers.

4. Check CLN Configuration:

   • Verify that the CloudLinux Network (CLN) configuration on your server is correct. You can find the CLN configuration file at /etc/sysconfig/rhn/up2date.

5. Restart CLN Services:

   • Try restarting the services responsible for CLN on your server. This can sometimes resolve temporary network issues.
   bash

5. sudo systemctl restart rhn-satellite sudo systemctl restart osad

6. Check CLN Logs:

   • Review the log files associated with CLN for any additional error messages or clues about the issue. These logs are typically located in /var/log/up2date/.

7. Contact CloudLinux Support:

   • If none of the above steps resolve the issue, it's advisable to contact CloudLinux support. They may have specific troubleshooting steps or insights related to your server's configuration.

8. Check for Outages:

   • There might be temporary outages or maintenance on CloudLinux servers. Check the CloudLinux status page or contact support to see if there are any known issues.

Remember to back up your important data and configuration files before making any significant changes to your server's setup. This way, you can easily revert to a working state if any issues arise during troubleshooting.