Same problem here. I am running the HDP sandbox 2.6.1 on VirtualBox 5.1.26 on a Centos 7 host. The VM never finishes booting. see attached screen shot. After about 10 minutes it is still starting the sandbox container (hdp1.png), and after 3 days it is stuck between cleaning up temporary directories and network manager script dispatcher (hdp2.png). ... View more