Hiera configuration file periodic reload?

I made a change to my Hiera configuration to add another line to the :hierarchy: yaml section. I was struggling to find out why it wasn't being picked up especially when the values returned correctly through local Vagrant testing and running the `hiera` command line tool on the Puppet Server instance.

It finally occurred to me that I had to restart all of my Puppet Server instances for it to take the change. It would be nice if I did not have to restart or send a signal to the Puppet Server just to see an update in my hiera.yaml.

Is this documented somewhere? Can re-reading the hiera configuration without intervention be implemented?

Thanks.