Building Mahout from source

Prerequisites

Java JDK 1.7
Apache Maven 3.3.3

Getting the source code

Checkout the sources from the Mahout GitHub repository either via

git clone git@github.com:apache/mahout.git or
 
git clone https://github.com/apache/mahout.git

##Hadoop version Mahout code depends on hadoop-client artifact, with the default version 2.4.1. To build Mahout against to a different hadoop version, hadoop.version property should be set accordingly and passed to the build command. Hadoop1 clients would additionally require hadoop1 profile to be activated.

The build lifecycle is illustrated below.

Compiling

Compile Mahout using standard maven commands

# With hadoop-2.4.1 dependency
mvn clean compile

# With hadoop-1.2.1 dependency
mvn -Phadoop1 -Dhadoop.version=1.2.1 clean compile

##Packaging

Mahout has an extensive test suite which takes some time to run. If you just want to build Mahout, skip the tests like this

# With hadoop-2.4.1 dependency
mvn -DskipTests=true clean package

# With hadoop-1.2.1 dependency
mvn -Phadoop1 -Dhadoop.version=1.2.1 -DskipTests=true clean package

In order to add mahout artifact to your local repository, run

# With hadoop-2.4.1 dependency
mvn clean install

# With hadoop-1.2.1 dependency
mvn -Phadoop1 -Dhadoop.version=1.2.1 clean install