Hi,
I am having this same issue with 5.12, just downloaded today (09-26-17)
sudo docker load -i cloudera-quickstart-vm-5.12.0-0-beta-docker.tar
open /var/lib/docker/tmp/docker-import-442656686/cloudera-quickstart-vm-5.12.0-0-beta-docker/json: no such file or directory
my version of docker:
docker -v
Docker version 17.05.0-ce, build 89658be
It appears to be an issue with the "docker save" command used to originally build the image. Anybody able to get this image running successfully?