If you startup one of our practice exams and the cluster services are not running, here are some things to try first:
1. Run the start_all_services.sh script. You can watch the progress of this script in Ambari - it uses the Ambari REST API to start all HDP services.
2. Login to Ambari and try to start services that way
3. Restart the ambari-agent process on each node in the cluster (password for root is hadoop), then run start_all_services.sh again:
ssh root@namenode "ambari-agent restart"
ssh root@resourcemanager "ambari-agent restart" # This only applies the HDPCA exam
ssh root@hiveserver "ambari-agent restart" # This only applies to the HDPCA exam
If none of the steps above fix the issue, then it is likely an issue with the Docker containers not starting properly. Since you do not have root access on your practice exam, the quickest solution is to simply terminate your EC2 instance and startup another one.
-Rich
