Hadoop Pseudo-Distributed Operation error: Protocol message tag had invalid wire type

Question

I am setting up a Hadoop 2.6.0 Single Node Cluster. I follow the hadoop-common/SingleCluster documentation. I work on Ubuntu 14.04. So far I have m

Answer 1

Do these changes in /etc/hosts:

1. Change:

127.0.0.1    localhost

to

127.0.0.1    localhost    marta-komputer

2. Delete:

127.0.0.1    marta-komputer

3. Add:

your-system-ip    marta-komputer

To find your system IP, type this in terminal

ifconfig

(find your IP address here) or type this:

ifdata -pa eth0

Your final /etc/hosts file should look like:

127.0.0.1       localhost       marta-komputer
your-system-ip       marta-komputer

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Change hdfs-site.xml:

1. Change:

hdfs://localhost:9000

to

hdfs://marta-komputer:9000

Now, stop and start hadoop processes.

Your jps command should list these processes:

Namenode
Datanode
TaskTracker
SecondaryNameNode

If it does not list all these processes, check respective logs for errors.

UPDATE:

1. Follow this tutorial here

2. If the problem persists, it might be due to permission issue.

UPDATE II:

1. Create a directory and change permissions for namenode and datanode:

sudo mkdir -p /usr/local/hdfs/namenode

sudo mkdir -p /usr/local/hdfs/datanode

sudo chown -R hduser:hadoop /usr/local/hdfs/namenode

sudo chown -R hduser:hadoop /usr/local/hdfs/datanode

2. Add these properties in hdfs-site.xml:

dfs.datanode.data.dir with value /usr/local/hdfs/datanode

dfs.namenode.data.dir with value /usr/local/hdfs/namenode

3. Stop and start hadoop processes.