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Posted to dev@mahout.apache.org by "qiang xu (Commented) (JIRA)" <ji...@apache.org> on 2012/02/14 13:38:59 UTC
[jira] [Commented] (MAHOUT-504) Kmeans clustering error
[ https://issues.apache.org/jira/browse/MAHOUT-504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207675#comment-13207675 ]
qiang xu commented on MAHOUT-504:
---------------------------------
./bin/mahout kmeans -i ./examples/bin/work/reuters-out-seqdir-sparse/tfidf-vectors/ -c ./examples/bin/work/clusters -o ./examples/bin/work/reuters-kmeans -x 10 -ow
Running on hadoop, using HADOOP_HOME=/data/hadoop_cluster/hadoop-0.20.2/
HADOOP_CONF_DIR=/data/hadoop_cluster/hadoop-0.20.2/conf/
12/02/14 20:56:03 INFO common.AbstractJob: Command line arguments: {--clusters=./examples/bin/work/clusters, --convergenceDelta=0.5, --distanceMeasure=org.apache.mahout.common.distance.SquaredEuclideanDistanceMeasure, --endPhase=2147483647, --input=./examples/bin/work/reuters-out-seqdir-sparse/tfidf-vectors/, --maxIter=10, --method=mapreduce, --output=./examples/bin/work/reuters-kmeans, --overwrite=null, --startPhase=0, --tempDir=temp}
12/02/14 20:56:03 INFO kmeans.KMeansDriver: Input: examples/bin/work/reuters-out-seqdir-sparse/tfidf-vectors Clusters In: examples/bin/work/clusters Out: examples/bin/work/reuters-kmeans Distance: org.apache.mahout.common.distance.SquaredEuclideanDistanceMeasure
12/02/14 20:56:03 INFO kmeans.KMeansDriver: convergence: 0.5 max Iterations: 10 num Reduce Tasks: org.apache.mahout.math.VectorWritable Input Vectors: {}
12/02/14 20:56:03 INFO kmeans.KMeansDriver: K-Means Iteration 1
12/02/14 20:56:05 INFO input.FileInputFormat: Total input paths to process : 1
12/02/14 20:56:06 INFO mapred.JobClient: Running job: job_201202131515_0122
12/02/14 20:56:07 INFO mapred.JobClient: map 0% reduce 0%
12/02/14 20:56:16 INFO mapred.JobClient: Task Id : attempt_201202131515_0122_m_000000_0, Status : FAILED
java.lang.IllegalStateException: No clusters found. Check your -c path.
at org.apache.mahout.clustering.kmeans.KMeansMapper.setup(KMeansMapper.java:60)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
It is really weired that cluster is gernerated
[root@qxutest mahout-distribution-0.5]# hadoop fs -ls /user/root/examples/bin/work/
Found 4 items
drwxr-xr-x - root supergroup 0 2012-02-14 20:55 /user/root/examples/bin/work/clusters
drwxr-xr-x - root supergroup 0 2012-02-14 20:56 /user/root/examples/bin/work/reuters-kmeans
drwxr-xr-x - root supergroup 0 2012-02-14 20:29 /user/root/examples/bin/work/reuters-out-seqdir
drwxr-xr-x - root supergroup 0 2012-02-14 20:32 /user/root/examples/bin/work/reuters-out-seqdir-sparse
[root@qxutest mahout-distribution-0.5]# hadoop fs -ls /user/root/examples/bin/work/clusters
Found 1 items
-rw-r--r-- 2 root supergroup 139 2012-02-14 20:55 /user/root/examples/bin/work/clusters/part-randomSeed
I follow the guide in https://cwiki.apache.org/MAHOUT/k-means-clustering.html
> Kmeans clustering error
> -----------------------
>
> Key: MAHOUT-504
> URL: https://issues.apache.org/jira/browse/MAHOUT-504
> Project: Mahout
> Issue Type: Bug
> Reporter: Zhen Guo
> Assignee: Robin Anil
> Fix For: 0.4
>
>
> I tried the Kmeans algorithm on the Synthetic Control data. The following error appears. I tried the Canopy algorithm, it is fine. This error is from Mapper. I am using Trunk.
> 10/09/20 19:40:06 INFO mapred.JobClient: Task Id : attempt_201008261432_1324_m_000000_0, Status : FAILED
> java.lang.IllegalStateException: Cluster is empty!
> at org.apache.mahout.clustering.kmeans.KMeansClusterMapper.setup(KMeansClusterMapper.java:57)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:583)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
> at org.apache.hadoop.mapred.Child.main(Child.java:170)
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