@Muhammad Umar PutHiveQL is the correct processor to use. However, the SQL/HiveQL has to be formatted and passed to it by the previous processor. For example, you can use the ReplaceText processor to build a HiveQL statement (e.g. INSERT INTO nifitest ...), and then pass the output to the PutHiveQL processor. The above is the correct way to do it. However, there is also a workaround; by using the SelectHiveQL processor, you can write an insert statement as below. Take a look at the below two links that will clarify everything with examples: https://community.hortonworks.com/questions/52328/how-to-insert-data-into-hive-using-nifi.html https://community.hortonworks.com/articles/45706/using-the-new-hiveql-processors-in-apache-nifi-070.html ... View more

Adding to the above: Workflow Manager has become GA with Ambari 2.5+. Prior to that it was tech preview in Ambari 2.4.x. If you are using a previous version, either upgrade your Ambari (which may be done independantly of HDP) or use Oozie directly. ... View more

@JT Ng Also, take a look at this series of step-by-steps to using Workflow Manager: https://community.hortonworks.com/articles/82964/getting-started-with-apache-ambari-workflow-design.html ... View more

@JT Ng Yes, you can upgrade Ambari independently of HDP. The latest version of Ambari is 2.5.1 so I recommend you move to that. Below is a link to the documentation where you will find more information about it as well as upgrade instructions (just skip the HDP upgrade parts). https://docs.hortonworks.com/HDPDocuments/Ambari/Ambari-2.5.1.0/index.html ... View more

@frank chen There's no specific processor for tensorflow. However, you can use the ExecuteStreamCommand to call shell scripts that call TensorFlow binaries. There are other ways to do this, including building a custom processor, but this is the easiest. To get an idea of how this would work, take a look at the below demo by @Timothy Spann that downloads linked images from twitter messages and runs Tensorflow image recognition on them. https://community.hortonworks.com/articles/59349/hdf-20-flow-for-ingesting-real-time-tweets-from-st.html ... View more

Adding to the response. Take a look at the step-by-step instructions by @S Mahapatra in the link that Sonu provided. ... View more

@Pulak Nath The practice exam on AWS is only meant to give you an idea of the format of the actual test rather than fully prepare you for it. As such, the tasks/questions will not change every time you complete the practice tasks. As always, if you find this post helpful, don't forget to "accept" answer. ... View more