[MAHOUT-1469] Streaming KMeans fails when executed in MapReduce mode and REDUCE_STREAMING_KMEANS is set to true

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.9
• Fix Version/s: 1.0.0
• Component/s: classic
• Labels: legacy
• Assignee: Suneel Marthi
• Reporter: Suneel Marthi
• Created: 20/Mar/14 06:47
• Updated: 31/Jan/24 22:14
• Resolved: 30/Mar/16 02:06

Description

Centroids are not being generated when executed in MR mode with -rskm flag set.

14/03/20 02:42:12 INFO mapreduce.StreamingKMeansThread: Estimated Points: 282
14/03/20 02:42:12 INFO mapred.JobClient:  map 100% reduce 0%
14/03/20 02:42:14 INFO mapreduce.StreamingKMeansReducer: Number of Centroids: 0
14/03/20 02:42:14 WARN mapred.LocalJobRunner: job_local1374896815_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:148)
	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)
14/03/20 02:42:14 INFO mapred.JobClient: Job complete: job_local1374896815_0001
14/03/20 02:42:14 INFO mapred.JobClient: Counters: 16
14/03/20 02:42:14 INFO mapred.JobClient:   File Input Format Counters 
14/03/20 02:42:14 INFO mapred.JobClient:     Bytes Read=17156391
14/03/20 02:42:14 INFO mapred.JobClient:   FileSystemCounters
14/03/20 02:42:14 INFO mapred.JobClient:     FILE_BYTES_READ=41925624
14/03/20 02:42:14 INFO mapred.JobClient:     FILE_BYTES_WRITTEN=25974741
14/03/20 02:42:14 INFO mapred.JobClient:   Map-Reduce Framework
14/03/20 02:42:14 INFO mapred.JobClient:     Map output materialized bytes=956293
14/03/20 02:42:14 INFO mapred.JobClient:     Map input records=21578
14/03/20 02:42:14 INFO mapred.JobClient:     Reduce shuffle bytes=0
14/03/20 02:42:14 INFO mapred.JobClient:     Spilled Records=282
14/03/20 02:42:14 INFO mapred.JobClient:     Map output bytes=1788012
14/03/20 02:42:14 INFO mapred.JobClient:     Total committed heap usage (bytes)=217214976
14/03/20 02:42:14 INFO mapred.JobClient:     Combine input records=0
14/03/20 02:42:14 INFO mapred.JobClient:     SPLIT_RAW_BYTES=163
14/03/20 02:42:14 INFO mapred.JobClient:     Reduce input records=0
14/03/20 02:42:14 INFO mapred.JobClient:     Reduce input groups=0
14/03/20 02:42:14 INFO mapred.JobClient:     Combine output records=0
14/03/20 02:42:14 INFO mapred.JobClient:     Reduce output records=0
14/03/20 02:42:14 INFO mapred.JobClient:     Map output records=282
14/03/20 02:42:14 INFO driver.MahoutDriver: Program took 506269 ms (Minutes: 8.437816666666667)

Issue Links

• supercedes: MAHOUT-1486 Streaming KMeans NPE