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Posted to dev@mahout.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2011/06/09 18:06:58 UTC
[jira] [Created] (MAHOUT-726) IntWritable / VectorWritable cast
problem in classifier/clustering implementations
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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[jira] [Commented] (MAHOUT-726) IntWritable / VectorWritable cast
problem in classifier/clustering implementations
Posted by "Hector Yee (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13046684#comment-13046684 ]
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.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Resolved] (MAHOUT-726) IntWritable / VectorWritable cast
problem in classifier/clustering implementations
Posted by "Sean Owen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen resolved MAHOUT-726.
------------------------------
Resolution: Not A Problem
Fix Version/s: (was: 0.6)
OK cool.
> 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
>
> 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.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira