Perfect. Thank you. Unfortunately, now I receive this exception:
java.io.IOException: wrong value class: org.apache.mahout.math.hadoop.DistributedRowMatrix$MatrixEntryWritable is not class org.apache.mahout.math.VectorWritable
My Mapper's value output and Reducer's input is a DRM.MatrixEntryWritable, and is specified as such in the Conf object. The Reducer's output is a VectorWritable. The stack trace doesn't mention any code of mine, so I'm not sure how to approach this.
The basic problem is that something has produced data that uses a long as an ID and your mapper is expecting an int. Have you posted your code as a patch on the jira or a git link?
I attached a patch to my project's ticket on jira (363). Thanks again! Regards, Shannon
