Has anyone seen this error while installing Developer portal 15.07?

[sudheendras]

Installer exists after showing this error.

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Step 4 of 6: Configure Apache Web Server

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Where should Dev Portal application files be installed? [/var/www/html]: /var/www/html

Dev Portal application directory already exists: /var/www/html

Dev Portal will be installed to: /var/www/html.

An Apache virtual host will be configured for the Developer Portal.

You will need to give a valid DNS configured hostname for this server or you will

not be able to connect to the server from any remote system. If you have not configured

this system with a hostname, use the IP address of the server.

What hostname or IP should be associated with the Dev Portal [10.72.6.252]: 10.72.6.252

Making sure Apache runs at startup

Starting Apache...

restart: unrecognized service