Check to see if the webservice is running, use this URL in a browser: http://cacti.geant.net:8888/restful/resources/cacti/about/ . You should get the following response:

<info>
    <version>2.0</version>
    <company>GEANT Ltd</company>
    <author>R.P.J.Sanigar</author>
    <created>18-May-2016</created>
</info>

Log files are created on the prod-cacti01-fra-de.geant.net server in the /tmp directory and start with the name BOD-Log. Check the contents of these files to see if any exceptions have been raised.