我正在使用cloudera虚拟机。hadoop版本：hadoop 2.0.0-cdh4.0.0。
我编写了一个inputfileformat，当客户端调用getsplits方法时，我得到一个异常：

IncompatibleClassChangeError found interface org.apache.hadoop.mapreduce.JobContext expecting

我使用的是mapreduce包中未Map的类。
但是，当我查看stacktrace时，我看到沿着该行的某个地方，库更改为mapred：

Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
    at com.hadoopApp.DataGeneratorFileInput.getSplits(DataGeneratorFileInput.java:27)
    at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1063)
    at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1080)
    at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:174)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:992)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:945)
    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:1408)
    at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:945)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:566)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:596)
    at com.hadoopApp.HBaseApp.generateData(HBaseApp.java:54)
    at com.hadoopApp.HBaseApp.run(HBaseApp.java:24)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.hadoopApp.HBaseApp.main(HBaseApp.java:19)
    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.hadoop.util.RunJar.main(RunJar.java:208)

不确定这是否有用，但我在maven pom中使用了：

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-core</artifactId>
    <version>1.2.1</version>
</dependency>

解决它不知道为什么改变我的pom到这个，并开始工作-不知道为什么它解决了它虽然-您的意见是非常感谢的：

<repositories>
        <repository>
            <id>cloudera</id>
            <url>https://repository.cloudera.com/artifactory/cloudera-repos/</url>
        </repository>
    </repositories>

         <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-common</artifactId>
            <version>2.0.0-cdh4.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>2.0.0-cdh4.2.0</version>
        </dependency>

你怎么能避开这个？