Downgraded to 0.20.203.0 and am able to run through the exercises. I now hit the next issue while trying to run the example.
bash> ./bin/mahout trainlogistic --input donut.csv \ > --output ./model \ > --target color --categories 2 \ > --predictors x y --types numeric \ > --features 20 --passes 100 --rate 50 Running on hadoop, using HADOOP_HOME=/usr/local/hadoop No HADOOP_CONF_DIR set, using /usr/local/hadoop/src/conf 11/07/26 04:21:58 WARN driver.MahoutDriver: Unable to add class: org.apache.mahout.utils.eval.InMemoryFactorizationEvaluator 11/07/26 04:21:58 WARN driver.MahoutDriver: Unable to add class: org.apache.mahout.utils.eval.ParallelFactorizationEvaluator 11/07/26 04:21:58 WARN driver.MahoutDriver: Unable to add class: org.apache.mahout.utils.eval.DatasetSplitter Exception in thread "main" java.lang.IllegalStateException: Unable to construct type converter... shouldn't be possible at org.apache.mahout.classifier.sgd.CsvRecordFactory.firstLine(CsvRecordFactory.java:223) at org.apache.mahout.classifier.sgd.TrainLogistic.mainToOutput(TrainLogistic.java:78) at org.apache.mahout.classifier.sgd.TrainLogistic.main(TrainLogistic.java:64) 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:188) 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:156) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.mahout.classifier.sgd.CsvRecordFactory.firstLine(CsvRecordFactory.java:215) ... 14 more Caused by: java.lang.IncompatibleClassChangeError: Expecting non-static method org.apache.mahout.vectorizer.encoders.CachingValueEncoder.bytesForString(Ljava/lang/String;)[B at org.apache.mahout.vectorizer.encoders.CachingValueEncoder.cacheProbeLocations(CachingValueEncoder.java:50) at org.apache.mahout.vectorizer.encoders.CachingValueEncoder.<init>(CachingValueEncoder.java:29) at org.apache.mahout.vectorizer.encoders.ConstantValueEncoder.<init>(ConstantValueEncoder.java:27) ... 19 more Figured out that bytesToString() is a static method in FeatureVectorEncoder.java and is referenced in CachingValueEncoder.cacheProbeLocations(). Modified the caller, CachingValueEncoder.cacheProbeLocations()to call FeatureValueencoder.bytesToString() and am good now. But I do see that bytesToString() is referenced in every class that extends FeatureVectorEncoder.java, wonder if its working. Kind Regards. ________________________________ From: Sean Owen <sro...@gmail.com> To: dev@mahout.apache.org; Suneel Marthi <suneel_mar...@yahoo.com> Sent: Tuesday, July 26, 2011 4:38 AM Subject: Re: Mahout newbiw question Yes, 0.5 goes with 0.20.2. HEAD/0.6 goes with 0.20.203.0 On Tue, Jul 26, 2011 at 9:02 AM, Suneel Marthi <suneel_mar...@yahoo.com> wrote: Never mind, figured it out I need to downgrade my Hadoop to 0.20.2 to fix this. > >Thanks. > > > > >________________________________ >From: Suneel Marthi <suneel_mar...@yahoo.com> >To: "dev@mahout.apache.org" <dev@mahout.apache.org> >Sent: Tuesday, July 26, 2011 3:58 AM >Subject: Mahout newbiw question > > > >Trying to run the examples in Chapter 13 of the book, get the following error >when trying to execute > > >bash> $MAHOUT_HOME/bin/mahout cat donut.csv > >Running on hadoop, using HADOOP_HOME=/usr/local/hadoop >No HADOOP_CONF_DIR set, using /usr/local/hadoop/src/conf >11/07/26 03:45:09 WARN driver.MahoutDriver: Unable to add class: >org.apache.mahout.utils.eval.InMemoryFactorizationEvaluator >11/07/26 03:45:09 WARN driver.MahoutDriver: Unable to add class: >org.apache.mahout.utils.eval.ParallelFactorizationEvaluator >11/07/26 03:45:09 WARN driver.MahoutDriver: Unable to add class: >org.apache.mahout.utils.eval.DatasetSplitter >Exception in thread "main" java.lang.NoSuchMethodError: >org.apache.hadoop.util.ProgramDriver.driver([Ljava/lang/String;)V > > at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:188) > 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:192) > > >Any idea as to what am I missing? > >Here are my environment details:- > >Hadoop version: 0.21.0 >Mahout version: 0.6
