In HDP 3.x Spenego authentication will be enabled by default when you enable Kerberos To access the UI you need to either configure Spnego auth in the browser OR disable spnego auth by setting the below  properties in Hdfs =>Advanced core-site   hadoop.http.authentication.simple.anonymous.allowed = true hadoop.http.authentication.type = simple   ... View more

@Harish-hadoop  try setting log_bin_trust_function_creators = 1 by using the below command in ranger db and retry installing the ranger service  # SET GLOBAL log_bin_trust_function_creators = 1    ... View more

@Christy09 You can use the below API to delete/ remove clients   # curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME/host_components/<SERVICE NAME>   Example: # curl -u admin:<Password> -H "X-Requested-By: ambari" -X DELETE http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTERNAME/hosts/HOSTNAME/host_components/YARN_CLIENT   ... View more

@Christy09  Use the below API to put a node/host in maintenance mode   curl -u <Username>:<Password> -H 'X-Requested-By:ambari' -i -X PUT -d '{"RequestInfo":{"context":"Turn On Maintenance Mode for host","query":"Hosts/host_name.in(<HOST_NAME>)"},"Body":{"Hosts":{"maintenance_state":"ON"}}}' http://<AMBARI_HOST>:8080/api/v1/clusters/<CLUSTER_NAME>/hosts   Example:  curl -u admin:<PASSWORD> -H 'X-Requested-By:ambari' -i -X PUT -d '{"RequestInfo":{"context":"Turn On Maintenance Mode for host","query":"Hosts/host_name.in(c486-node2.coelab.cloudera.com)"},"Body":{"Hosts":{"maintenance_state":"ON"}}}' http://c486-node1.coelab.cloudera.com:8080/api/v1/clusters/c486/hosts     ... View more