title: hadoop installation on ec2
body: <p>I am trying to install a multinode cluster in EC2 by following <a href="https://dzone.com/articles/how-set-multi-node-hadoop" rel="nofollow">https://dzone.com/articles/how-set-multi-node-hadoop</a></p>
  
  <p>Everything seemed to work:
  I have a namenode and a datanode and I have the following processes running:</p>
  
  <p>namenode: 1389 NameNode,1687 JobTracker, 1590 SecondaryNameNode
  datanode: 1415 TaskTracker, 1286 DataNode</p>
  
  <p>I could check the namenode status from "ec2-XX-XXX-XXX-XXX.compute-1.amazonaws.com:50070/dfshealth.jsp" and check Jobtracker status : "ec2-XX-XXX-XXX-XXX.compute-1.amazonaws.com:50030/jobtracker.jsp"</p>
  
  <p>The problems came when I tried to check the TaskTracker Status in "ec2-XXX-XX-XXX-XXX-X.compute-1.amazonaws.com:50060/tasktracker.jsp "because I received the message "The page is not available".</p>
  
  <p>I have also tried to run a mapreduce job:</p>
  
  <p>hadoop jar hadoop-examples-1.2.1.jar pi 10 1000000</p>
  
  <p>but I received an error:</p>
  
  <p>"File /user/ubuntu/PiEstimator_TMP_3_141592654/in/part0 could only be replicated to 0 nodes, instead of 1"</p>
  
  <p>Could anyone help me with that?</p>
  
  <p>Thanks</p>