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  1. Mahout
  2. MAHOUT-1486

Streaming KMeans NPE

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Duplicate
    • 0.8
    • 0.10.0
    • Clustering
    • None

    Description

      I am assuming that this occurs because of --reduceStreamingKMeans (-rskm) option set. Will try and test it without reduce and report if the NPE goes away.

      Error: java.lang.NullPointerException
      at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:187)
      at org.apache.mahout.math.random.WeightedThing.<init>(WeightedThing.java:31)
      at org.apache.mahout.math.neighborhood.BruteSearch.searchFirst(BruteSearch.java:127)
      at org.apache.mahout.clustering.ClusteringUtils.estimateDistanceCutoff(ClusteringUtils.java:116)
      at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansThread.call(StreamingKMeansThread.java:63)
      at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer.reduce(StreamingKMeansReducer.java:55)
      at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer.reduce(StreamingKMeansReducer.java:35)
      at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:171)
      at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:627)
      at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:389)
      at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:165)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:415)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
      at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:160)

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              smarthi Suneel Marthi
              reinis_v Reinis Vicups
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                Created:
                Updated:
                Resolved: