java - is it possible to use apache mahout without hadoop dependency? - Stack Overflow

Definitely, yes. In the Mahout Recommender First-Timer FAQ they advise against starting out with a Hadoop-based implementation (unless you know you're going to be scaling past 100 million user preferences relatively quickly).

You can use the implementations of the Recommender interface in a pure-Java fashion relatively easily. Or place one in the servlet of your choice.

Technically, Mahout has a Maven dependency on Hadoop. But you can use recommenders without the Hadoop JARs easily. This is described in the first few chapters of Mahout in Action - you can download the sample source code and see how it's done - look at the file RecommenderIntro.java.

However, if you're using Maven, you would need to exclude Hadoop manually - the dependency would look like this:

<dependency>          <groupId>org.apache.mahout</groupId>          <artifactId>mahout-core</artifactId>          <exclusions>              <exclusion>                  <groupId>org.apache.hadoop</groupId>                  <artifactId>hadoop-core</artifactId>              </exclusion>          </exclusions>  </dependency>

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