Why does `kdumpctl` hang during startup or restart if dumping target is set to nfs?

Solution Verified - Updated -

Issue

  • Why does kdumpctl hang during startup or restart if dumping target is set to nfs?
# kdumpctl start
kdump: DEFAULT_DUMP_MODE=kdump
kdump: restore default initrd: /boot/initramfs-4.18.0-477.21.1.el8_8.x86_64.img
kdump: Detected change(s) in the following file(s):  /etc/kdump.conf
kdump: Rebuilding /boot/initramfs-4.18.0-477.21.1.el8_8.x86_64kdump.img
kdump: rebuild kdump initrd: /sbin/mkdumprd -f /boot/initramfs-4.18.0-477.21.1.el8_8.x86_64kdump.img 4.18.0-477.21.1.el8_8.x86_64
....<hang here>.....

Environment

  • Red Hat Enterprise Linux 8.
  • kexec-tools-2.0.20-34.el8.x86_64 and later.

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