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https://issues.apache.org/jira/browse/MAHOUT-457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895810#action_12895810
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Sebastian Schelter commented on MAHOUT-457:
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{quote}
I think you are missing a slash in the URI:
s3:/testingbucket-12345/tmp/prePartialMultiply2
What happens if you try:
s3://testingbucket-12345/tmp/prePartialMultiply2
Andrew
{quote}
Hi Andrew,
I only specified the input path of the job (did that correctly with s3:// at
the beginning) and the pathes for the M/R jobs executed before the
"partialMultiply" worked correctly. I guess it must have to do something with
the fact that this path contains two comma-separated URLs.
I don't know why there's only one slash in the stracktrace, maybe that was a
typo from me as I had to change the real name of the bucket before posting here.
> ItemSimilarityJob and RecommenderJob don't work on Amazon ElasticMapReduce
> --------------------------------------------------------------------------
>
> Key: MAHOUT-457
> URL: https://issues.apache.org/jira/browse/MAHOUT-457
> Project: Mahout
> Issue Type: Bug
> Components: Collaborative Filtering
> Reporter: Sebastian Schelter
> Attachments: MAHOUT-457.patch
>
>
> 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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