Apache MRUnit Build Instructions REQUIREMENTS: - Java 1.6 - Apache Maven 2.2.1 or higher - Access to the internet BUILDING: From the command line: Building MRUnit is dependent upon the version of Hadoop Map Reduce you intend to use. Hadoop Map Reduce 1.X or 0.20.X: $ mvn package This produces mrunit-${VERSION}-hadoop1.jar in the target directory. Hadoop Map Reduce 2.X or 0.23.X: $ mvn package -Dhadoop.version=2 This produces mrunit-${VERSION}-hadoop2.jar in the target directory. If you wish you skip the unit tests (not advised): $ mvn package -DskipTests You can also clean the project by running: $ mvn clean From Eclipse: 1. Install the m2eclipse plugin from http://m2eclipse.sonatype.org/ 2. Restart Eclipse 3. Select File -> Import... -> Existing Maven Project... 4. After the project has been imported, it may be necessary to right click the project in the project explorer and select Maven -> Update Project Configuration. This is also normally necessary if you change a build plugin or some other element of the build itself. See the m2eclipse docs for details.