Aria Operations for Logs 8.x
The root partition is full on one, some or all of the nodes in the cluster.
df -h
Typically, the root partition is either 'sda-4' or 'sda-5'.
In the '/var/log/' directory, the 'messages' file has grown to over 4GB.
cd /var/log
ls -lthr
The 'messages' file can be truncated by running the following command while in the '/var/log' directory;
truncate -s 0 messages
Check the utilisation again;
df -h
The boot partition should be around 40 - 45%. If this is true, then reboot the nodes.