Hadoop cluster setup - java.net.ConnectException: Connection refused
问题 I want to setup a hadoop-cluster in pseudo-distributed mode. I managed to perform all the setup-steps, including startuping a Namenode, Datanode, Jobtracker and a Tasktracker on my machine. Then I tried to run some exemplary programms and faced the java.net.ConnectException: Connection refused error. I stepped back to the very first steps of running some operations in standalone mode and faced the same problem. I performed even triple-check of all the installation steps and have no idea how