Hi,
I am following the Apache Mahout Cookbook tutorials and I tried to run a
classifier on 20newsGroup.I managed to convert the files in SF then run the
TF-IDF algorithm, and split the Data into Train/test. But when I finally
build my model with trainnb, here is the error I got.
Did this already occur to someone?
Regards,
xenlee -
[mapr@fb-mapr1 new]$ mahout trainnb -i /input/new/20news-train-vectors -el
-o /input/new/model -li /input/new/labelindex -ow
No MAHOUT_CONF_DIR found
MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
Running on hadoop, using /opt/mapr/hadoop/hadoop-0.20.2/bin/hadoop and
HADOOP_CONF_DIR=/opt/mapr/hadoop/hadoop-0.20.2/conf
MAHOUT-JOB: /opt/mapr/mahout/mahout-0.9/mahout-examples-0.9-mapr-job.jar
14/08/07 08:22:44 WARN driver.MahoutDriver: No trainnb.props found on
classpath, will use command-line arguments only
14/08/07 08:22:44 INFO common.AbstractJob: Command line arguments:
{--alphaI=[1.0], --endPhase=[2147483647], --extractLabels=null,
--input=[/input/new/20news-train-vectors],
--labelIndex=[/input/new/labelindex], --output=[/input/new/model],
--overwrite=null, --startPhase=[0], --tempDir=[temp]}
14/08/07 08:22:44 INFO zlib.ZlibFactory: Successfully loaded & initialized
native-zlib library
14/08/07 08:22:44 INFO compress.CodecPool: Got brand-new decompressor
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1
at
org.apache.mahout.classifier.naivebayes.BayesUtils.writeLabelIndex(BayesUtils.java:123)
at
org.apache.mahout.classifier.naivebayes.training.TrainNaiveBayesJob.createLabelIndex(TrainNaiveBayesJob.java:180)
at
org.apache.mahout.classifier.naivebayes.training.TrainNaiveBayesJob.run(TrainNaiveBayesJob.java:94)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at
org.apache.mahout.classifier.naivebayes.training.TrainNaiveBayesJob.main(TrainNaiveBayesJob.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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:195)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:197)
