what could be the reason for this Cardinality exception?
10/01/13 01:41:09 INFO clustering.SolrToMahoutDriver: Wrote: 174 vectors 10/01/13 01:41:09 INFO clustering.SolrToMahoutDriver: Dictionary Output file: /store/dev/inst/mahout-0.2/email-clustering/1-solr-vectors/dictionary.txt 10/01/13 01:41:11 INFO dirichlet.DirichletDriver: Iteration 0 10/01/13 01:41:11 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId= 10/01/13 01:41:11 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same. 10/01/13 01:41:11 INFO mapred.FileInputFormat: Total input paths to process : 1 10/01/13 01:41:11 INFO mapred.JobClient: Running job: job_local_0001 10/01/13 01:41:11 INFO mapred.FileInputFormat: Total input paths to process : 1 10/01/13 01:41:11 INFO compress.CodecPool: Got brand-new decompressor 10/01/13 01:41:11 INFO mapred.MapTask: numReduceTasks: 1 10/01/13 01:41:11 INFO mapred.MapTask: io.sort.mb = 100 10/01/13 01:41:12 INFO mapred.MapTask: data buffer = 79691776/99614720 10/01/13 01:41:12 INFO mapred.MapTask: record buffer = 262144/327680 10/01/13 01:41:12 WARN mapred.LocalJobRunner: job_local_0001 org.apache.mahout.matrix.CardinalityException at org.apache.mahout.matrix.AbstractVector.dot(AbstractVector.java:92) at org.apache.mahout.clustering.dirichlet.models.NormalModel.pdf(NormalModel.java:111) at org.apache.mahout.clustering.dirichlet.models.NormalModel.pdf(NormalModel.java:28) at org.apache.mahout.clustering.dirichlet.DirichletState.adjustedProbability(DirichletState.java:129) at org.apache.mahout.clustering.dirichlet.DirichletMapper.normalizedProbabilities(DirichletMapper.java:111) at org.apache.mahout.clustering.dirichlet.DirichletMapper.map(DirichletMapper.java:47) at org.apache.mahout.clustering.dirichlet.DirichletMapper.map(DirichletMapper.java:38) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307) at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:176) 10/01/13 01:41:12 INFO mapred.JobClient: map 0% reduce 0% 10/01/13 01:41:12 INFO mapred.JobClient: Job complete: job_local_0001 10/01/13 01:41:12 INFO mapred.JobClient: Counters: 0 10/01/13 01:41:12 WARN dirichlet.DirichletDriver: java.io.IOException: Job failed! java.io.IOException: Job failed! at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1252) at org.apache.mahout.clustering.dirichlet.DirichletDriver.runIteration(DirichletDriver.java:214) at org.apache.mahout.clustering.dirichlet.DirichletDriver.runJob(DirichletDriver.java:139) at org.apache.mahout.clustering.dirichlet.DirichletDriver.main(DirichletDriver.java:109) at org.bogdan.clustering.mbeans.Clusters.doClustering(Clusters.java:244) at org.bogdan.clustering.mbeans.Clusters.access$0(Clusters.java:175) at org.bogdan.clustering.mbeans.Clusters$1.run(Clusters.java:148) at java.lang.Thread.run(Thread.java:619)
