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Fernando Santos commented on MAHOUT-1034: ----------------------------------------- Hello, I'm passing through the same problem while running 'trainnb' in a single node. The bug status is 'Resolved', but did anyone could run this example in a cluster mode actually? If so, in which versions of mahout and hadoop? Thanks!! > ERROR in Navie Bayes Training(update: seqdirectory does not give output) > ------------------------------------------------------------------------ > > Key: MAHOUT-1034 > URL: https://issues.apache.org/jira/browse/MAHOUT-1034 > Project: Mahout > Issue Type: Bug > Components: Classification > Affects Versions: 0.7 > Environment: Ubuntu 11.04 > Reporter: Leting Wu > Assignee: Robin Anil > > When run either examples/classify-20newsgrouops.sh or ash-email-examples.sh, > trainnb always fails: > {noformat} > INFO mapred.JobClient: Task Id : attempt_201206281546_0003_m_000000_0, Status > : FAILED > java.lang.IllegalArgumentException > at > com.google.common.base.Preconditions.checkArgument(Preconditions.java:72) > at > org.apache.mahout.classifier.naivebayes.training.WeightsMapper.setup(WeightsMapper.java:42) > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:647) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323) > at org.apache.hadoop.mapred.Child$4.run(Child.java:270) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1177) > at org.apache.hadoop.mapred.Child.main(Child.java:264) > {noformat} -- This message was sent by Atlassian JIRA (v6.1#6144)