Hi,
I try ALS recommender using Java code. This is the steps i follow:
1. I create DatasetSplitter Job
2. I create ParallelALSFactorizationJob Job
3. I create FactorizationEvaluator Job
4. I create RecommenderJob Job
Everything is ok for 1 to 3. But when i run the RecommenderJob , i have
the following error
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java.lang.Exception: java.lang.RuntimeException:
java.lang.ClassCastException:
org.apache.mahout.math.map.OpenIntObjectHashMap cannot be cast to
org.apache.mahout.common.Pair
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:403)
.
.
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I'm suprised to see that if i run steps 1 to 3 using my java code, and the
last step using the command line "mahout recommendfactorized ........"
with the files generates with my java code steps 1 to 3), recommendations
are correctly generated.
Thanks you very much
Evans
