In a 5 node hadoop cluster setup using Cloudera Manager Standard 4.8.0, one node is configured as namenode. However it also runs the secondary namenode service. Is it mandatory to keep this service or can this service be removed. I have no plans to put a secondary namenode server at the moment.
Just want to add that secondary namenode is better to be running on a different node as the name node (in a real cluster environment). Since you have 5 nodes in your cluster, you can place the secondary namenode somewhere in the cluster.