Using the 0.23 profile might allow you to compile a version that works with CDH4. Until Cloudera cares enough to test and commit a patch, however, we can't be sure.
On Thu, Jan 10, 2013 at 5:52 PM, Marty Kube < [email protected]> wrote: > Hi Shengchao, > My understanding is that CDH4 is not supported. Try CDH3. > Marty > On 01/10/2013 01:03 PM, Shengchao Ding wrote: > >> I'm running the 20 newsgroups examples on virtual machine of CDH4.1.2. >> It ran smoothly but failed if I modify the split command to >> >> mahout split \ >> -i newsgroup/vectors \ >> --trainingOutput newsgroup/train-vectors \ >> --testOutput newsgroup/test-vectors \ >> --randomSelectionPct 40 --overwrite --sequenceFiles -xm mapreduce >> -mro newsgroup/mro >> >> The only different to original command is that the method is modified >> to mapreduce while the original example is sequential. >> >> I got the following exception. >> >> Error: java.lang.RuntimeException: java.lang.**ClassNotFoundException: >> Class org.apache.mahout.utils.**SplitInputJob$SplitInputMapper not found >> at org.apache.hadoop.conf.**Configuration.getClass(** >> Configuration.java:1571) >> at org.apache.hadoop.mapreduce.**task.JobContextImpl.** >> getMapperClass(JobContextImpl.**java:186) >> at org.apache.hadoop.mapred.**MapTask.runNewMapper(MapTask.** >> java:685) >> at org.apache.hadoop.mapred.**MapTask.run(MapTask.java:332) >> at org.apache.hadoop.mapred.**YarnChild$2.run(YarnChild.** >> java:152) >> at java.security.**AccessController.doPrivileged(**Native >> Method) >> at javax.security.auth.Subject.**doAs(Subject.java:396) >> at org.apache.hadoop.security.**UserGroupInformation.doAs(** >> UserGroupInformation.java:**1332) >> at org.apache.hadoop.mapred.**YarnChild.main(YarnChild.java:** >> 147) >> Caused by: java.lang.**ClassNotFoundException: Class >> org.apache.mahout.utils.**SplitInputJob$SplitInputMapper not found >> at org.apache.hadoop.conf.**Configuration.getClassByName(** >> Configuration.java:1477) >> at org.apache.hadoop.conf.**Configuration.getClass(** >> Configuration.java:1569) >> ... 8 more >> >> >> I checked the mahout package on the distribution as follows. >> >> [cloudera@localhost ~]$ jar tf >> /usr/lib/mahout/mahout-**examples-0.7-cdh4.1.2-job.jar | grep SplitInput >> org/apache/mahout/utils/**SplitInputJob$**SplitInputReducer.class >> org/apache/mahout/utils/**SplitInputJob$**SplitInputMapper.class >> org/apache/mahout/utils/**SplitInputJob$**SplitInputComparator.class >> org/apache/mahout/utils/**SplitInputJob.class >> org/apache/mahout/utils/**SplitInput.class >> org/apache/mahout/utils/**SplitInput$SplitCallback.class >> >> Can anyone help me out? Thanks. >> >> >
