debuging error in mahout

[jamal sasha <ja...@gmail.com>]

Hi,

   I have a huge dataset with around 100 variables and I want to run
logistic regression algo on in.



bin/mahout trainlogistic  --input /path_to_input/prepared_input.csv
--output mahoutmodel  --target default --categories 2 –predictors id1 id2
id3  --types numeric  --features 2 --passes 100 --rate 50

But I am getting an error

Running on hadoop, using HADOOP_HOME=/opt/mapr/hadoop/hadoop-0.20.2

No HADOOP_CONF_DIR set, using /opt/mapr/hadoop/hadoop-0.20.2/conf

Exception in thread "main" java.lang.NullPointerException

        at
org.apache.mahout.classifier.sgd.CsvRecordFactory.firstLine(CsvRecordFactory.java:167)

        at
org.apache.mahout.classifier.sgd.TrainLogistic.main(TrainLogistic.java:75)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        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:187)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.hadoop.util.RunJar.main(RunJar.java:186)



What am I doing ??