Hadoop: connect to host localhost port 22: Connection refused when running start-dfs.sh

Question

When starting the latest (Okt 2014) Hadoop with start-dfs.sh we are seeing:

connect to host localhost port 22: Connection refused when running

Answer 1

Install openssh server.

For Ubuntu command is :

sudo apt-get install openssh-server

In hadoop-env.sh file ( present in /etc/hadoop) add the following line :

export HADOOP_SSH_OPTS="-p 22"