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Posted to dev@mahout.apache.org by "Neil Walkinshaw (JIRA)" <ji...@apache.org> on 2013/07/15 23:32:49 UTC

[jira] [Created] (MAHOUT-1285) Arff loader can misparse string data as double

Neil Walkinshaw created MAHOUT-1285:
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             Summary: Arff loader can misparse string data as double
                 Key: MAHOUT-1285
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1285
             Project: Mahout
          Issue Type: Bug
    Affects Versions: 0.9
         Environment: Linux Ubuntu 12.4
            Reporter: Neil Walkinshaw


Have successfully loaded numerous ARFF files with Mahout (originally generated via WEKA). The files contain randomly generated data. For a specific random seed, the following exception is thrown:

java.lang.NumberFormatException: For input string: "b1shkt70694difsmmmdv0ikmoh"
	at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1241)
	at java.lang.Double.parseDouble(Double.java:540)
	at org.apache.mahout.utils.vectors.arff.MapBackedARFFModel.processNumeric(MapBackedARFFModel.java:146)
	at org.apache.mahout.utils.vectors.arff.MapBackedARFFModel.getValue(MapBackedARFFModel.java:97)
	at org.apache.mahout.utils.vectors.arff.ARFFIterator.computeNext(ARFFIterator.java:77)
	at org.apache.mahout.utils.vectors.arff.ARFFIterator.computeNext(ARFFIterator.java:30)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)
	at org.apache.mahout.utils.vectors.io.SequenceFileVectorWriter.write(SequenceFileVectorWriter.java:44)
	at org.apache.mahout.utils.vectors.arff.Driver.writeFile(Driver.java:251)
	at org.apache.mahout.utils.vectors.arff.Driver.main(Driver.java:145)
	at libInterfaces.MahoutTraceBuilder.generateMahoutFile(MahoutTraceBuilder.java:38)
	at libInterfaces.MahoutTraceBuilder.generateMahoutReader(MahoutTraceBuilder.java:42)
	at tests.InputTester.testMahoutMeansShift(InputTester.java:111)

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