HADOOP-18209. In Namenode UI Links are not working proper and port were displaying wrong in UI IPv6 (#4184)

Contributed by  Renukaprasad C.

Signed-off-by: Mingliang Liu <liuml07@apache.org>

hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/dfshealth.js

@@ -227,8 +227,10 @@
           var n = nodes[i];
           n.usedPercentage = Math.round((n.used + n.nonDfsUsedSpace) * 1.0 / n.capacity * 100);
 
-          var port = n.infoAddr.split(":")[1];
-          var securePort = n.infoSecureAddr.split(":")[1];
+          var array = n.infoAddr.split(":");
+          var port = array[array.length-1];
+          array = n.infoSecureAddr.split(":");
+          var securePort = array[array.length-1];
           var dnHost = n.name.split(":")[0];
           n.dnWebAddress = "http://" + dnHost + ":" + port;
           if (securePort != 0) {