docs(demo/hbase-hdfs-load-cycling-data): Add hints about the active namenode for browsing files.

Author: NickLarsenNZ

docs/modules/demos/pages/hbase-hdfs-load-cycling-data.adoc

@@ -206,7 +206,7 @@ image::hbase-hdfs-load-cycling-data/hbase-table-ui.png[]
 
 == Accessing the HDFS web interface
 
-You can also see HDFS details via a UI by running `stackablectl stacklet list` and following the link next to one of the namenodes.
+You can also see HDFS details via a UI by running `stackablectl stacklet list` and following the http links next to the namenodes.
 
 Below you will see the overview of your HDFS cluster.
 
@@ -218,6 +218,11 @@ image::hbase-hdfs-load-cycling-data/hdfs-datanode.png[]
 
 You can also browse the file system by clicking on the `Utilities` tab and selecting `Browse the file system`.
 
+[TIP]
+====
+Check that the namenode you browse to is the _active_ namenode in the Overview page. Otherwise you will not be able to browse files.
+====
+
 image::hbase-hdfs-load-cycling-data/hdfs-data.png[]
 
 Navigate in the file system to the folder `data` and then the `raw` folder.