oozie抛出错误java.lang.CompatibileClassChangeError:找到了接口org.apache.hadoop.mapreduce.Counter，但应为类

我已经编写了一个mapreduce类，在该类中，当我执行mapreduce代码时，我使用了一个计数器，我得到了这个错误

java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.Counter, but class was expected
    at MyProg.run(Unknown Source)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at MyProg.main(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:454)
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:393)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:327)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232)
    at org.apache.hadoop.mapred.Child.main(Child.java:264)

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有人能告诉我为什么会出现这个错误吗？

看起来Oozie和您拥有的Hadoop版本之间存在版本冲突，而Oozie是根据这个版本构建的。看看这个（已解决的）hadoop问题：

这张罚单中有几个补丁，你可以试着运行