I'm not entirely sure what the differences are... but according to Cloudera documentation, upgrading from CDH3 to CDH4 does involve a recompile. http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/4.2.0/CDH4-Release-Notes/cdh4ki_topic_1_6.html
On Sun, Sep 29, 2013 at 8:29 PM, lei liu <liulei...@gmail.com> wrote: > Yes, My job is compiled in CHD3u3, and I run the job on CDH4.3.1, but I > use the mr1 of CHD4.3.1 to run the job. > > What are the different mr1 of cdh4 and mr of cdh3? > > Thanks, > > LiuLei > > > 2013/9/30 Pradeep Gollakota <pradeep...@gmail.com> > >> 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 >>> >> >> >
