title: Error while clustering data with kmeans
body: <p>I'm trying to perform clustering for k means algorithm for the input data shown here:
  <a href="https://cwiki.apache.org/MAHOUT/clustering-of-synthetic-control-data.html" rel="nofollow">https://cwiki.apache.org/MAHOUT/clustering-of-synthetic-control-data.html</a>
  However when the map reduce job is about to take place i get the error </p>
  
  <pre><code>11/10/16 21:05:57 INFO mapred.JobClient: Task Id : attempt_201110161920_0008_m_000000_0,     Status : FAILED
  Error: java.lang.ClassNotFoundException: org.apache.mahout.math.Vector
  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Class.java:247)
  at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762)
  at org.apache.hadoop.io.WritableName.getClass(WritableName.java:71)
  at org.apache.hadoop.io.SequenceFile$Reader.getValueClass(SequenceFile.java:1613)
  at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1555)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1428)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1417)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1412)
  at org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.initialize(SequenceFileRecordReader.java:50)
  at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:418)
  at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:620)
  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
  at org.apache.hadoop.mapred.Child.main(Child.java:170)
  
  11/10/16 21:06:03 INFO mapred.JobClient: Task Id : attempt_201110161920_0008_m_000000_1, Status : FAILED
  Error: java.lang.ClassNotFoundException: org.apache.mahout.math.Vector
  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Class.java:247)
  at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762)
  at org.apache.hadoop.io.WritableName.getClass(WritableName.java:71)
  at org.apache.hadoop.io.SequenceFile$Reader.getValueClass(SequenceFile.java:1613)
  at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1555)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1428)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1417)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1412)
  at   org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.initialize(SequenceFileRecordReader.java:50)
  at    org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:418)
  at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:620)
  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
  at org.apache.hadoop.mapred.Child.main(Child.java:170)
  
  11/10/16 21:06:09 INFO mapred.JobClient: Task Id : attempt_201110161920_0008_m_000000_2,     Status : FAILED
      Error: java.lang.ClassNotFoundException: org.apache.mahout.math.Vector
  at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Class.java:247)
  at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:762)
  at org.apache.hadoop.io.WritableName.getClass(WritableName.java:71)
  at org.apache.hadoop.io.SequenceFile$Reader.getValueClass(SequenceFile.java:1613)
  at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1555)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1428)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1417)
  at org.apache.hadoop.io.SequenceFile$Reader.&lt;init&gt;(SequenceFile.java:1412)
  at org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader.initialize(SequenceFileRecordReader.java:50)
  at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:418)
  at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:620)
  at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
  at org.apache.hadoop.mapred.Child.main(Child.java:170)
  
  11/10/16 21:06:18 INFO mapred.JobClient: Job complete: job_201110161920_0008
  11/10/16 21:06:18 INFO mapred.JobClient: Counters: 3
  11/10/16 21:06:18 INFO mapred.JobClient:   Job Counters 
  11/10/16 21:06:18 INFO mapred.JobClient:     Launched map tasks=4
  11/10/16 21:06:18 INFO mapred.JobClient:     Data-local map tasks=4
  11/10/16 21:06:18 INFO mapred.JobClient:     Failed map tasks=1
  Exception in thread "main" java.lang.InterruptedException: K-Means Iteration failed processing output/clusters-0/part-randomSeed
  at org.apache.mahout.clustering.kmeans.KMeansDriver.runIteration(KMeansDriver.java:363)
  at org.apache.mahout.clustering.kmeans.KMeansDriver.buildClustersMR(KMeansDriver.java:310)
  at org.apache.mahout.clustering.kmeans.KMeansDriver.buildClusters(KMeansDriver.java:237)
  at org.apache.mahout.clustering.kmeans.KMeansDriver.run(KMeansDriver.java:152)
  at org.apache.mahout.clustering.syntheticcontrol.kmeans.Job.run(Job.java:149)
  at org.apache.mahout.clustering.syntheticcontrol.kmeans.Job.main(Job.java:60)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
  at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
  at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:187)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  at java.lang.reflect.Method.invoke(Method.java:597)
  at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
  </code></pre>
  
  <p>Can somebody please tell me how to rectify this . This would really mean a lot.
  Thanks for your time.</p>