Java Mahout:缺少用于创建序列文件的类

我将按照处的说明将现有文件转换为序列文件：

VectorWriter vectorWriter = SequenceFile.createWriter(filesystem,
                                                  configuration,
                                                  outfile,
                                                  LongWritable.class,
                                                  SparseVector.class);

long numDocs = vectorWriter.write(new VectorIterable(), Long.MAX_VALUE);

我已经将mahout jar包含在我的maven项目中：

    <dependency>
        <groupId>org.apache.mahout</groupId>
        <artifactId>mahout-core</artifactId>
        <version>0.9</version>
    </dependency>

---

这对我来说意味着我丢失了一个jar——有人知道是哪一个吗？

问题是我在Lenskit中使用它，而

配置
类试图使用
线程.currentThread（）.getContextClassLoader（）
，而该类（无论出于何种原因）没有mahout或hadoop包。完整的代码是：

final Configuration configuration = new Configuration();
configuration.setClassLoader(Configuration.class.getClassLoader());

final Path path = new Path(POINTS_PATH + "/pointsFile");

LocalFileSystem fs = new LocalFileSystem();
fs.initialize(URI.create(POINTS_PATH + "/pointsFile"), configuration);

final SequenceFile.Writer writer =
        SequenceFile.createWriter(
                fs,
                configuration,
                path,
                Text.class,
                VectorWritable.class);

Serilization class not found: java.lang.ClassNotFoundException: org.apache.hadoop.io.serializer.WritableSerialization

final Configuration configuration = new Configuration();
configuration.setClassLoader(Configuration.class.getClassLoader());

final Path path = new Path(POINTS_PATH + "/pointsFile");

LocalFileSystem fs = new LocalFileSystem();
fs.initialize(URI.create(POINTS_PATH + "/pointsFile"), configuration);

final SequenceFile.Writer writer =
        SequenceFile.createWriter(
                fs,
                configuration,
                path,
                Text.class,
                VectorWritable.class);