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Posted to dev@mahout.apache.org by "Andrew Musselman (JIRA)" <ji...@apache.org> on 2014/01/22 05:58:19 UTC
[jira] [Created] (MAHOUT-1402) Zero clusters using streaming
k-means option in cluster-reuters.sh
Andrew Musselman created MAHOUT-1402:
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Summary: Zero clusters using streaming k-means option in cluster-reuters.sh
Key: MAHOUT-1402
URL: https://issues.apache.org/jira/browse/MAHOUT-1402
Project: Mahout
Issue Type: Bug
Components: Clustering
Affects Versions: 0.8
Environment: AWS default Linux AMI
Reporter: Andrew Musselman
Fix For: 0.9
Running cluster-reuters.sh in examples/bin results in this:
[snip]
INFO: Number of Centroids: 0
Jan 22, 2014 1:52:22 AM org.apache.hadoop.mapred.LocalJobRunner$Job run
WARNING: job_local23982482_0001
java.lang.IllegalArgumentException: Must have nonzero number of training and test vectors. Asked for %.1f %% of %d vectors for test [10.000000149011612, 0]
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:120)
at org.apache.mahout.clustering.streaming.cluster.BallKMeans.splitTrainTest(BallKMeans.java:176)
at org.apache.mahout.clustering.streaming.cluster.BallKMeans.cluster(BallKMeans.java:192)
at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer.getBestCentroids(StreamingKMeansReducer.java:107)
at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer.reduce(StreamingKMeansReducer.java:73)
at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer.reduce(StreamingKMeansReducer.java:37)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:177)
at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:649)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:418)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:398)
[snip]
WARNING: No qualcluster.props found on classpath, will use command-line arguments only
Num clusters: 0; maxDistance: 0.000000
[Dunn Index] First: Infinity
[Davies-Bouldin Index] First: NaN
Jan 22, 2014 1:52:24 AM org.slf4j.impl.JCLLoggerAdapter info
INFO: Program took 535 ms (Minutes: 0.008916666666666666)
cluster,distance.mean,distance.sd,distance.q0,distance.q1,distance.q2,distance.q3,distance.q4,count,is.train
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