Hi All,
I am used to running mahout (mahout-core-0.9-SNAPSHOT-job.jar) in the
Apache Hadoop environment, however, we had to switch to Cloudera
distribution.
When I try to run the item based collaborative filtering job
(org.apache.mahout.cf.taste.hadoop.item.RecommenderJob) in the Cloudera
distribution, I get the following error,
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
interface org.apache.hadoop.mapreduce.JobContext, but class was expected
at
org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:174)
at
org.apache.mahout.common.AbstractJob.prepareJob(AbstractJob.java:614)
at
org.apache.mahout.cf.taste.hadoop.preparation.PreparePreferenceMatrixJob.run(PreparePreferenceMatrixJob.java:75)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.run(RecommenderJob.java:158)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.main(RecommenderJob.java:312)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:208)
Is there a way to run Mahout in the Cloudera environment? I mean, a
download specific to Cloudera distribution of Hadoop?
Thanks in advance,
Rohit
