If the request is not being denied, then my question should be changed. The REST request above used to work - but now on Ambari 2.2 it does not have any affect. Here is something else that is interesting - when I try to start all services using the following request: curl -u admin:admin -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start all services"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://namenode:8080/api/v1/clusters/horton/services?ServiceInfo this request gets accepted by Ambari, but here is what it does: That image is not cropped - all that happens is Pig, Slider, Sqoop and the Tez Client get installed. What I expected to see was all of my services starting. Again, this is based on the curl command above that I have used with Ambari 2.1 regularly. ... View more

Changing "services" to "requests" resulted in a bad request - maybe I need to change something else? I have never started a service using "requests" before: HTTP/1.1 400 Bad Request { "status" : 400, "message" : "org.apache.ambari.server.controller.spi.UnsupportedPropertyException: The properties [ServiceInfo/state] specified in the request or predicate are not supported for the resource type Request." } ... View more

You need to view this page carefully - the current exam is on HDP 2.2 with Ambari 1.7: http://hortonworks.com/training/class/hdp-certified-developer-hdpcd-exam/ That can change at any time, but for now you should be prepared for that environment. The Sandbox can be helpful when practicing and learning Pig and Hive, but I would highly recommend you attempt the practice exam. It is on the same environment as the real exam and contains tasks similar to the real exam. ... View more

How you run the script is irrelevant on the exam. If you can get it to work from the command line, then that is perfect. ... View more

Thanks. I logged in to it and everything looks fine. MySQL is running on the namenode, as expected, and I can run the mysql client to view the data in it. Let me know if you need any further assistance. ... View more

Are you running Pig (or starting the Grunt shell) with the -useHCatalog flag? ... View more

Because you are using the wrong class name for HCatLoader. It should be: org.apache.hive.hcatalog.pig.HCatLoader Let me know if that fixes your issue. ... View more

@Vidya SK: You do not need to use the REGISTER command to use any of the standard libraries, which includes the HCatLoader and HCatStorer class. ... View more