I have been wrestling with clustering the broadcast group router.

I have written a testing spec to verify my findings that it just does not seem to work currently, and better visualise that.

The following repository contains my broadcast group clustering test spec:

https://github.com/mrrd/AkkaBroadcastGroupTests

This seems to show that the clustered broadcast-group is only adding a single node routee to it, it should really be two as far as I can see.