HDFS-7998. HDFS Federation : Command mentioned to add a NN to existing federated cluster is wrong (Contributed by Ajith S)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -666,6 +666,9 @@ Release 2.8.0 - UNRELEASED
 
     HDFS-8332. DFS client API calls should check filesystem closed (Rakesh R via umamahesh)
 
+    HDFS-7998. HDFS Federation : Command mentioned to add a NN to existing
+    federated cluster is wrong (Ajith S via vinayakumarb)
+
 Release 2.7.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/Federation.md

@@ -187,7 +187,7 @@ Perform the following steps:
 * Refresh the Datanodes to pickup the newly added Namenode by running
   the following command against all the Datanodes in the cluster:
 
-        [hdfs]$ $HADOOP_PREFIX/bin/hdfs dfsadmin -refreshNameNode <datanode_host_name>:<datanode_rpc_port>
+        [hdfs]$ $HADOOP_PREFIX/bin/hdfs dfsadmin -refreshNamenodes <datanode_host_name>:<datanode_rpc_port>
 
 Managing the cluster
 --------------------