cPanel default backup system may fail to create and save backup of your server and send you following message:
Possible cause of the problem
Any old backup process is still running in background on the server.
Confirm the cause
Login to your server as root via SSH and execute following command
Most probably it will show you following type message:
Backup process currently running. Pid: 5378 Backup log file: /usr/local/cpanel/logs/cpbackup/1377934812.log
We need to kill the current running backup process. Note the Pid from above and run following command. Change xxxx to Pid number that you have got from above.
kill -9 xxxx
cPanel backup should now run normally. You can force to start a new fresh backup process using below command: