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From "Peter Sergeant (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAHOUT-1639) streamingkmeans doesn't properly validate estimatedNumMapClusters -km
Date Tue, 27 Jan 2015 02:41:35 GMT
Peter Sergeant created MAHOUT-1639:
--------------------------------------

             Summary: streamingkmeans doesn't properly validate estimatedNumMapClusters -km
                 Key: MAHOUT-1639
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1639
             Project: Mahout
          Issue Type: Bug
          Components: CLI
    Affects Versions: 0.9
            Reporter: Peter Sergeant
            Priority: Minor


The value of -km isn't checked by the CLI, which means if you don't specify it, you get the
rather cryptic:

{noformat}
Exception in thread "main" java.lang.NumberFormatException: null
	at java.lang.Integer.parseInt(Integer.java:454)
	at java.lang.Integer.parseInt(Integer.java:527)
	at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansDriver.configureOptionsForWorkers(StreamingKMeansDriver.java:252)
	at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansDriver.run(StreamingKMeansDriver.java:239)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
	at org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansDriver.main(StreamingKMeansDriver.java:491)
	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)
{noformat}

Other parameters give helpful error messages when required



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