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... moreI 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 to fix it. (I am new to Hadoop and a beginner Ubuntu user thus I kindly ask you for "taking it into account" if providing any guide or tip).
This is the error output I keep receiving:
hduser@marta-komputer:/usr/local/hadoop$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar grep input output 'dfs+'
15/02/22 18:23:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
15/02/22 18:23:04 INFO client.RMProxy:... less