Start Phase doesn't properly work in RecommenderJob
---------------------------------------------------
Key: MAHOUT-802
URL: https://issues.apache.org/jira/browse/MAHOUT-802
Project: Mahout
Issue Type: Bug
Reporter: Grant Ingersoll
Priority: Minor
I'm trying to run RecommenderJob and do --startPhase 2 since I have my prefs
already in the right format. Unfortunately, when I do that, I get:
{quote}
java.lang.IllegalArgumentException: Number of columns was not correctly set!
at
com.google.common.base.Preconditions.checkArgument(Preconditions.java:88)
at
org.apache.mahout.math.hadoop.similarity.RowSimilarityJob$SimilarityReducer.setup(RowSimilarityJob.java:296)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:174)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:648)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:256)
{quote}
This appears to be due to the fact that the numberOfUsers variable defaults to
0 and is only set when phase 1 is run.
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