Improve Stochastic Balancer to include the HDFS region location hints to avoid HDFS Balancer destroying data locality.
Right now according to a mix of docs, jiras and mailing list info it appears that one must change
to the org.apache.hadoop.hbase.favored.FavoredNodeLoadBalancer as it looks like this functionality is only within FavoredNodeBalancer and not the standard Stochastic Balancer.
This is not ideal because we'd still like to use all the heuristics and work that has gone in the Stochastic Balancer which I believe right now is the best and most mature HBase balancer.
See also the linked Jiras and this discussion: