I believe it's a difference between the version that your code was compiled against vs the version that you're running against. Make sure that you're not packaging hadoop jar's into your jar and make sure you're compiling against the correct version as well.
On Sun, Sep 29, 2013 at 7:27 PM, lei liu <liulei...@gmail.com> wrote: > I use the CDH-4.3.1 and mr1, when I run one job, I am getting the > following error. > > Exception in thread "main" java.lang.IncompatibleClassChangeError: Found > interface org.apache.hadoop.mapreduce.JobContext, but class was expected > > at > org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:152) > > 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(Nativ > e 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.taobao.hbase.test.RandomKVGenerater.main(RandomKVGenerater.java:248) > > > How can I handle the error? > > Thanks, > > LiuLei >
