title: How to fix the error: test source folder 'src/test/java' in project must have an output folder that is not also used for main source"?
body: <p>I have installed mahout and I have imported the existing maven project <code>apache-mahout-distribution-0.12.2</code> to Eclipse IDE for Java Developers and can not build and I couldn't fix these problems. Please share me your knowledge!</p>