Looking at /var/log/boot.ini
[FAILED] Failed to start Crash recovery kernel arming.
See 'systemctl status kdump.service' for details.
To Disable kdump
# systemctl disable kdump.service
To keep kdump and fix, modify crashkernel value in grub
# vi /etc/default/grub
Change the crashkernel value from auto to 128, 256 or 512
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=0
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=256 rhgb quiet"
GRUB_DISABLE_RECOVERY="true
Reconfigure grub
# grub2-mkconfig -o /boot/grub2/grub.cfg