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https://issues.apache.org/jira/browse/MAHOUT-726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13046684#comment-13046684
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Hector Yee commented on MAHOUT-726:
-----------------------------------
Turns out to be user error, I was using the reuters-vectors directory instead
of reuters-vectors/tfidf-vectors
> IntWritable / VectorWritable cast problem in classifier/clustering
> implementations
> ----------------------------------------------------------------------------------
>
> Key: MAHOUT-726
> URL: https://issues.apache.org/jira/browse/MAHOUT-726
> Project: Mahout
> Issue Type: Bug
> Components: Classification, Clustering
> Affects Versions: 0.5
> Reporter: Sean Owen
> Fix For: 0.6
>
>
> I think we've seen this sort of error, most recently reported by Hector:
> Exception in thread "main" java.lang.ClassCastException:
> org.apache.hadoop.io.IntWritable cannot be cast to
> org.apache.mahout.math.VectorWritable
> at
> org.apache.mahout.clustering.kmeans.RandomSeedGenerator.buildRandom(RandomSeedGenerator.java:90)
> at
> org.apache.mahout.clustering.kmeans.KMeansDriver.run(KMeansDriver.java:102)
> Hector indicates it's also in LDA and Dirichlet, so probably a common issue
> to all, though also I suspect an easy fix whatever it is.
> Tracking it formally with a JIRA to record the resolution.
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