Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at
their default, what do you need to do when adding a new slave node to cluster?
A.
Nothing, other than ensuring that the DNS (or/etc/hosts files on all machines) contains any
entry for the new node.
B.
Restart the NameNode and ResourceManager daemons and resubmit any running jobs.
C.
Add a new entry to /etc/nodes on the NameNode host.
D.
Restart the NameNode of dfs.number.of.nodes in hdfs-site.xml