what version of NiFi are you using?   There are some bugs with InvokeHttp in older versions.   Can you access that url from that machine via curl?  There may be a networking or firewall issue.   https://www.datainmotion.dev/2021/01/flank-real-time-transit-information-for.html https://www.datainmotion.dev/2021/03/using-cloudera-flow-management-powered.html https://community.cloudera.com/t5/Community-Articles/Real-Time-Stock-Processing-With-Apache-NiFi-and-Apache-Kafka/ta-p/249221 https://community.cloudera.com/t5/Community-Articles/Smart-Stocks-with-FLaNK-NiFi-Kafka-Flink-SQL/ta-p/308223 ... View more