Affects Version/s: None
Fix Version/s: YARN-4757
In some environments, the entire container subnet may not be used exclusively by containers (ie the YARN nodemanager host IPs may also be part of the larger subnet).
As a result, the reverse lookup zones created by the YARN Registry DNS server may not match those created on the forwarders.
YARN Registry DNS only allows for creating (as the total IP count is greater than 256):
Provide configuration to further subdivide the subnets.