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Posted to dev@mahout.apache.org by "leon lee (JIRA)" <ji...@apache.org> on 2010/08/13 09:23:16 UTC
[jira] Commented: (MAHOUT-476) bug when running
org.apache.mahout.classifier.bayes.WikipediaDatasetCreatorDriver on hadoop
[ https://issues.apache.org/jira/browse/MAHOUT-476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12898113#action_12898113 ]
leon lee commented on MAHOUT-476:
---------------------------------
similar error happened when running 20news group dataset:
$HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-0.3.job org.apache.mahout.classifier.bayes.TrainClassifier --gramSize 3 --input 20news-input --output newsmodel --classifierType bayes -source hdfs
Status : FAILED
Error: org.apache.mahout.classifier.bayes.mapreduce.common.BayesFeatureMapper$IteratorTokenStream.addAttribute(Ljava/lang/Class;)Lorg/apache/lucene/util/Attribute;
> bug when running org.apache.mahout.classifier.bayes.WikipediaDatasetCreatorDriver on hadoop
> -------------------------------------------------------------------------------------------
>
> Key: MAHOUT-476
> URL: https://issues.apache.org/jira/browse/MAHOUT-476
> Project: Mahout
> Issue Type: Bug
> Components: Classification
> Affects Versions: 0.3
> Environment: hadoop 0.20.2
> mahout-0.3
> ubuntu
> Reporter: leon lee
>
> when I follow wiki instruction: https://cwiki.apache.org/MAHOUT/wikipedia-bayes-example.html
> (by the way, the bayes examples document in wiki need update to 0.3 )
> to run step 5:
> Create the countries based Split of wikipedia dataset.
> I use the following command:
> $HADOOP_HOME/bin/hadoop jar $MAHOUT_HOME/examples/target/mahout-examples-0.3.job org.apache.mahout.classifier.bayes.WikipediaDatasetCreatorDriver -i $MAHOUT_HOME/examples/work/wikipedia/chunks -o $MAHOUT_HOME/examples/work/wikipediainput -c $MAHOUT_HOME/examples/src/test/resources/country.txt
> and failed on hadoop.
> see hadoop log, it hint:
> Error: org.apache.lucene.wikipedia.analysis.WikipediaTokenizer.addAttribute(Ljava/lang/Class;)Lorg/apache/lucene/util/Attribute
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