Hortonworks Installation - Keyserver Connection

Trying to install Hortonworks on Ubuntu 18, I was not able to connect to the keyserver using:

apt-key adv --recv-keys --keyserver keyserver.ubuntu.com B9733A7A07513CAD

to fix this i used the following instead

apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 B9733A7A07513CAD

This is the successful output:
Executing: /tmp/apt-key-gpghome.abd3V0BdXN/gpg.1.sh --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 B9733A7A07513CAD
gpg: key B9733A7A07513CAD: public key "Jenkins (HDP Builds) <jenkin@hortonworks.com>" imported
gpg: Total number processed: 1
gpg: imported: 1

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