Why does Ubuntu start file checking on every reboot?
It appears as though your swap partition is missing and your /etc/fstab file is still looking for it.
Comment out the line for the swap and reboot the system
sudo sed -i 's/UUID=8c8e15fd-b638-4930-a664-ea326b6f3c23/#UUID=8c8e15fd-b638-4930-a664-ea326b6f3c23' /etc/fstab
The above line will add a # in front of that line so that the system doesn't try to mount a non-existing partition at boot.
Hope this helps!