Hadoop cluster setup - java.net.ConnectException: Connection refused

Question

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 Tasktracke

Answer 1

In /etc/hosts:

1. Add this line:

your-ip-address your-host-name

example: 192.168.1.8 master

In /etc/hosts:

2. Delete the line with 127.0.1.1 (This will cause loopback)

3. In your core-site, change localhost to your-ip or your-hostname

Now, restart the cluster.