@D5ha   Your issue is a mutual TLS handshake issue and really has nothing specific to do with NiFi itself.  There are a lot of resources on the web for creating certificates.  There are even free services like Tinycert you can use to generate valid certificate meeting the requirements I shared in my last response.   Providing guidance on how to create certificates does not make much sense since it can be done so many ways: - Self-signed - public CA - Corporate/private CA etc. Your current shared TLS exception is telling you that the IP or Hostname (you have BLUE line through it in yoru image) was not found as a Subject Alternative Name (SAN) in the certificate created for the server side of this handshake which in yoru case happens to also be your NiFi instance.   The Site-To-Site-Bulletin-Reporting-Task is acting as the client in this Mutual TLS handshake and the NiFi server S2S destination URL is the server side of this TLS handshake. If you found that the provided solution(s) assisted you with your query, please take a moment to login and click Accept as Solution below each response that helped. Thank you, Matt ... View more

yes code is same for small tables it works fine also, here I need to query around (~200GB) data ... View more