To remove the error, edit the file C:\Windows\System32\driver\etc\hosts defining “vapp” as IP address of the virtual machine. This address is shown on the console window at start up. Keep in mind the ipaddress may change if you restart the machine in which case you will have to remap to a new ip address.
+++++++ Update - This answer is incorrect, see below for correct answer
Xnay that. You have to map vapp from the virtual box to the local machine (not ther other ay around as I incorrectly guided you before.) In order to do this, edit the hosts file (/etc/hosts) in the virtual box and add in an entry for vapp to the local loopback mapping. The line should read as follows:
127.0.0.1 vapp localhost localhost.localdomain localhost4 localhost4.localdomain4
After editing, you can test by pinging vapp from within the console.
vapp is the hostname of the linux host. Putting vapp in the hosts file allows prpc to resolve the ipaddress. It looks like there is a problem resolving the hostname automatically perhaps due to a coding error however this does solve the problem.