Comments on: Install Hadoop Multinode Cluster using CDH4 in RHEL/CentOS 6.5

By: HAIFA BEN AOUICHA

HAIFA BEN AOUICHA — Wed, 06 Dec 2017 10:14:08 +0000

Hello Lyle,

May you please give me further details about the modifications you brought to the HDFS-site.xml.

I am facing the same issue as you : connection refused in port 8020 and telnet / netstat commands don’t fetch any process listening in port 8020.

Thanks a lot in advance for your feedback, best regards

By: suresh kumar

suresh kumar — Fri, 15 Sep 2017 10:39:47 +0000

All the daemons started properly but slaves are not communicating with master one throwing an error port no 22 connection refused

how can resolve this problem

By: Rohit

Rohit — Mon, 17 Apr 2017 17:18:02 +0000

How about writing a blog on how to install pig using hadoop single node cluster

By: Adiputra

Adiputra — Tue, 20 Dec 2016 08:11:35 +0000

need tutorial using nosql and hadoop please

By: Nitish

Nitish — Fri, 20 May 2016 13:40:39 +0000

Getting Error in Step 11 : Create HDFS /tmp and MapReduce /var Directories

sudo -u hdfs hadoop fs -mkdir /tmp
Error is:-
mkdir: Call From master/192.168.56.101 to master:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

The hdfs-site.xml is configured as:-

dfs.namenode.name.dir
file:///data/1/dfs/nn,/nfsmount/dfs/nn

dfs.permissions.superusergroup
hadoop

dfs.namenode.http-address
192.168.56.101:50070

The address and port on which the NameNode UI will listen.

Can you please assist me in understanding what I missed.

Telnet isn’t working as no process is listening on 8020 port.

Regards
Nitish