The error "kdumpctl:Dump path /dump//var/crash does not exist" occurred when building the kdump initrd.

Issue

• The error "kdumpctl:Dump path /dump//var/crash does not exist" occurred when building the kdump initrd.

systemd:Started Virtualization daemon.
kdumpctl:No kdump initial ramdisk found.
kdumpctl:Rebuilding /boot/initramfs-3.10.0-229.el7.x86_64kdump.img
kdumpctl:Dump path /dump//var/crash does not exist.
kdumpctl:mkdumprd: failed to make kdump initrd
kdumpctl:Starting kdump: [FAILED]
systemd:kdump.service: main process exited, code=exited, status=1/FAILURE
systemd:Failed to start Crash recovery kernel arming.
systemd:Unit kdump.service entered failed state.