ItemSimilarityJob and RecommenderJob don't work on Amazon ElasticMapReduce
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Key: MAHOUT-457
URL: https://issues.apache.org/jira/browse/MAHOUT-457
Project: Mahout
Issue Type: Bug
Components: Collaborative Filtering
Reporter: Sebastian Schelter
I'm currently evaluating ItemSimilarityJob and RecommenderJob on
ElasticMapReduce, it seems we have some small problems with S3, mostly due to
the fact that we need to use Filesystem.get(path.toUri(), conf) instead of
Filesystem.get(conf) in the code. I will create a patch for that the next days.
I'm writing this mail because I encountered another problem I currently can't
solve. RecommenderJob is emulating MultipleInputs (which is currently missing
in Hadoop 0.20 AFAIK) by reading data from a combined path that is built like
that:
new Path(prePartialMultiplyPath1 + "," + prePartialMultiplyPath2)
My Job always fails with this exception here:
java.lang.IllegalArgumentException: Invalid hostname in URI
s3:/testingbucket-12345/tmp/prePartialMultiply2
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