I also faced this issue once.
Please follow these steps and before installing Cassandra please make sure installation of JDK & python2.7.
Step 1: Install OpenJDK JRE 8
Apache Cassandra requires the latest release of Java 8. For that you can choose to install the latest release of OpenJDK JRE 1.8 as below:
sudo apt install openjdk-8-jre -y
Having OpenJDK JRE 1.8 installed, you can confirm the installation result:
java -version
The output will be similar to the following:
openjdk version "1.8.0_151" OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12) OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
Optionally, you can create the JAVA_HOME environment variable as follows:
echo "JAVA_HOME=$(readlink -f /usr/bin/java | sed "s:bin/java::")" | sudo tee -a /etc/profile
source /etc/profile
echo $JAVA_HOME
Step 2: Install Python 2.7, if it's missing on your system
Apache Cassandra requires Python 2.7 rather than Python 3. If you operate Apache Cassandra in a Python 3 environment, you may have trouble launching the
the shell of Apache Cassandra.
First, determine the existence and version of Python on your machine:
python -V
On Ubuntu 16.04 LTS, the output can be slightly confusing:
The program 'python' can be found in the following packages:
* python-minimal
* python3
Ask your administrator to install one of them
That actually means you need to install Python 2.7 by yourself:
sudo apt install python -y
Re-run the
command and the output will become:
Python 2.7.12
Step 3: Install the latest stable release of Apache Cassandra
Create the Apache Cassandra 3.11.x apt repo:
echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list
curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -
If you encounter a GPG public key error, run the following commands to add the mentioned Apache Cassandra public key, which is
in this case:
sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-key A278B781FE4B2BDA
sudo apt-get update
Use the newly added repo to install Apache Cassandra:
sudo apt-get install cassandra
Step 4: Test the installation of Apache Cassandra
Start the Apache Cassandra daemon:
sudo service cassandra start
If you want to make Apache Cassandra automatically start at system boot, run the following command:
sudo update-rc.d cassandra defaults
Next, use the nodetool
program to show the status of Apache Cassandra on the current node:
nodetool status
The output will resemble the following:
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID Rack
UN 127.0.0.1 102.66 KiB 256 100.0% 23916cfd-892d-4898-857c-aff9efe2354a rack1
You can use the
shell to interact with Apache Cassandra:
cqlsh localhost
The output will be similar to the following:
For now, just type
and then press ENTER to quit the cqlsh shell.
If you want to stop Apache Cassandra, execute the following command:
sudo service cassandra stop
