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https://issues.apache.org/jira/browse/MAHOUT-1034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13409563#comment-13409563
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Sean Owen commented on MAHOUT-1034:
-----------------------------------
I can't help with this since I didn't write the code. But it is nothing to do
with the properties file or command line. Your command line is wrong many ways.
"numLabels" is not the key. You have a space after -D. -D options are something
you pass to java, not just any old script. But this still isn't addressing the
error which concerns what Hadoop sends to workers.
Please see the discussion above. If you are not using 0.20.205 this may be the
problem.
> ERROR in Navie Bayes Training(trainnb)
> --------------------------------------
>
> 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
> Priority: Critical
>
> 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}
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