Ошибка - 2 errors WordCount.java:61: cannot find symbol WordMapper.class

Решение проблемы здесь: http://fkn.ktu10.com/?q=node/5647

WordCount.java:61: cannot find symbol WordMapper.class
symbol : class WordMapper
location: class WordCount
job.setMapperClass(WordMapper.class

org/apache/hadoop/fs/Path.class(org/apache/hadoop/fs:Path.class): warning: Cannot find annotation method 'value()' in type 'org.apache.hadoop.classification.InterfaceAudience.LimitedPrivate': class file for org.apache.hadoop.classification.InterfaceAudience not found
WordCount.java:61: cannot find symbol
symbol  : class WordMapper
location: class WordCount
    job.setMapperClass(WordMapper.class);
                       ^
WordCount.java:62: cannot find symbol
symbol  : class SumReducer
location: class WordCount
    job.setReducerClass(SumReducer.class);
                        ^
2 errors