We've three nodes cluster of HDP 2.4 stack. We are trying to run spark jobs using oozie workflow, did all the workaround mentioned in this post as well as posted in other Hortonworks community. But still we are getting error: "Failing Oozie Launcher, Main class [org.apache.oozie.action.hadoop.SparkMain], main() threw exception, Call From ip-172-63-10-15.eu-west-1.compute.internal/172.63.10.15 to 0.0.0.0:8032 failed on co nnection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused java.net.ConnectException: Call From ip-172-63-10-15.eu-west-1.compute.internal/172.63.10.15 to 0.0.0.0:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused" Any suggestion, what we are missing and what settings needs to done? ... View more