Win7 Eclipse 下执行mahout的K-means算法 报 InputMapper not found

啥情况额 有没有大神以前遇到过
Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.mahout.clustering.conversion.InputMapper not found
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1905)
        at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:722)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.lang.ClassNotFoundException: Class org.apache.mahout.clustering.conversion.InputMapper not found
        at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:1811)
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1903)
        ... 8 more

[main] (Job.java:1441) 2014-10-24 14:21:07 - Task Id : attempt_1414131597221_0001_m_000000_1, Status : FAILED
Error: java.lang.RuntimeException: java.lang.ClassNotFoundException: Class org.apache.mahout.clustering.conversion.InputMapper not found
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1905)
        at org.apache.hadoop.mapreduce.task.JobContextImpl.getMapperClass(JobContextImpl.java:186)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:722)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: java.lang.ClassNotFoundException: Class org.apache.mahout.clustering.conversion.InputMapper not found
        at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:1811)
        at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:1903)
        ... 8 more

Class org.apache.mahout.clustering.conversion.InputMapper not found

像这种一般跟开发环境有关系，仔细检查下自己的开发环境

类型啊，包的引用啊，都检查下