Hi @Mamy D I would look at the various tutorials that are available at Hortonworks.com that go through real-time analytics and try them on your installed cluster. You may also want to include Hortonworks Data Flow. A good one to get started with Kafka may be: https://hortonworks.com/tutorial/realtime-event-processing-in-hadoop-with-nifi-kafka-and-storm/ Best of luck on your journey. ... View more

@Divakar Annapureddy @Sonu Sahi Hi thank you so much for your help.Actually, the issue was due to the Ambari Database.I reminded that I accidently dropped the Ambari Database.So I re-installed the Database and now everything working well. Thank you 🙂 ... View more