@vrathod The following ambari API can be used to see the required components list by a particular service like "Hive" http://localhost:8080/api/v1/stacks/HDP/versions/2.5/services/HIVE required_services: ["ZOOKEEPER", "HDFS", "YARN", "TEZ", "PIG", "SLIDER" ], . ... View more

@Sedat Kestepe For Pig View the hcat proxy settings are needed. Please see the following link for more details on this: https://docs.hortonworks.com/HDPDocuments/Ambari-2.4.2.0/bk_ambari-views/content/setup_WebHCat_proxy_user_pig_view.html We must set up an HDFS proxy user for WebHCat and a WebHCat proxy user for the Ambari Server daemon account. To setup the HDFS proxy user for WebHCat : In Ambari Web, browse to Services > HDFS > Configs. Under the Advanced tab, navigate to the Custom core-site section. Click Add Property… to add the following custom properties: hadoop.proxyuser.hcat.groups=* hadoop.proxyuser.hcat.hosts=* . ... View more

@Viswa One of the reason can be special characters (Non printable) in the command Because the error that you are getting can occur if "hdfs" command is not able to locate the class related to the argument. Example:: # hdfs dsfadmin -safemode enter Error: Could not find or load main class dsfadmin - In this example i intentionally made a spelling mistake in 'dfsadmin" argument to explain. In your case it might be due to some special hidden chars. . So you should try check that you are not copying and pasting the command in the terminal... instead try to manually type the command. Also check the output of the following to see if you are getting the correct command output: # hdfs --help | grep dfsadmin dfsadmin run a DFS admin client ... View more