Introduction
Zookeeper provides cluster management for Hadoop.
In this post, I’m going to install Zookeeper in Pseudo mode, so please use these instructions for setting up a developer’s workstation, not for a production cluster.
Installation
The zookeeper package should already be installed, but we’ll double check.
sudo apt-get install zookeeper
Next, we’ll install the Zookeeper Server.
sudo apt-get install zookeeper-server
The following files are now installed:
/etc/zookeeper/conf/zoo.cfg: Zookeeper configuration file
sudo service zookeeper-server stop
sudo service zookeeper-server start
If you have installed Zookeeper before installing HBase, you will see the following error message:
Using config: /etc/zookeeper/conf/zoo.cfg
ZooKeeper data directory is missing at /var/lib/zookeeper fix the path or run initialize
invoke-rc.d: initscript zookeeper-server, action "start" failed.
You need to initialize Zookeeper when it’s installed before HBase.
sudo service zookeeper-server init
Now you can start Zookeeper.
sudo service zookeeper-server start
AkbarAhmed.com 
Double check that JAVA_HOME is set for the account that zookeeper is being run as.
echo $JAVA_HOME
Also, check your Java version:
java -version
Hi Akbar,
I appreciate your efforts in providing such a valuable tutorial. JAVA_HOME has been set and I have java-6-oracle installed. But it seems sun java is req
While installing zookeeper, I am facing following error:
Setting up hbase-master (0.94.2+218-1.cdh4.2.1.p0.8~precise-cdh4.2.1) …
Starting Hadoop HBase master daemon: +======================================================================+
| Error: JAVA_HOME is not set and Java could not be found |
+———————————————————————-+
| Please download the latest Sun JDK from the Sun Java web site |
| > http://java.sun.com/javase/downloads/ < |
| |
| HBase requires Java 1.6 or later. |
| NOTE: This script will find Sun Java whether you install using the |
| binary or the RPM based installer. |
+======================================================================+
invoke-rc.d: initscript hbase-master, action "start" failed.
dpkg: error processing hbase-master (–configure):
Pl. help.
Sushant