Hi all, I have an Ambari 1.4/HDP 2.0.6 environment that is split between two data centers -- a main site and a recovery site. We have NameNode HA enabled with automatic failover and the problem we are facing is how to divide the journal nodes across both sites so that failover happens appropriately.
It seems that only one site will always have a majority of journal nodes and if that site NN were to go down, the other site NN would no longer be able to start as it couldn't reach a majority of the journal nodes. Is there any way around this? I know an odd number of journal nodes is recommended but what would happen if we were to place an even number of journal nodes at each site? Thanks for any input!
