@sho aa I strongly recommend starting a new question in the community versus adding new questions and setup scenarios under an existing question. You current "Answer" is a new question which is not directly related to the issue expressed in the original question of this post. Creating a new question gets that question exposed to more users of this forum. I am not an HBase Subject Matter Expert (SME). As far as NiFi is concerned, how the NiFi Hbase processor within HDF's NiFi and the Hbase processor in Apache NIFi is no different. The Error you are showing in the screenshot states that the CS is unable to resolve the hostname "sandbox-hdp.hortonworks.com" which means it can no figure out what the IP address is. If it cannot resolve the hostname, it is not going to be able to communicate with that endpoint. While the config come from the provided site.xml files to the CS, there may be challenges accessing ports with the sandbox from an external resources. I am also not an expert with the HDP sandbox. If above tips do not help, best option is to start a new question that will engage more forum users. Thank you, Matt
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