You also need to add the jar to the classpath so it's available in your main. You can do soemthing like this:
HADOOP_CLASSPATH=/usr/local/mahout/math/target/mahout-math-0.6-SNAPSHOT.jar hadoop jar ... -Joey On Tue, Jan 31, 2012 at 1:38 PM, Daniel Quach <danqu...@cs.ucla.edu> wrote: > For Hadoop 0.20.203 (the latest stable), is it sufficient to do this to parse > the lib jars from the command line? > > public static main (String args[]) { > Configuration conf = new Configuration(); > String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs(); > > Job job = new Job(conf, "makevector"); > job.setJarByClass(MakeVector.class); > // etc other code for mappers/reducers > } > > I'm thinking I am missing a step here which is why it won't load the mahout > jar while running the map reduce. > > On Jan 30, 2012, at 11:10 PM, Daniel Quach wrote: > >> I compiled using javac: >> >> javac -classpath >> :/usr/local/hadoop/hadoop-core-0.20.203.0.jar:/usr/local/hadoop/lib/commons-cli-1.2.jar:/usr/local/mahout/math/target/mahout-math-0.6-SNAPSHOT.jar >> -d makevector_classes/ MakeVector.java; >> >> If I don't include the mahout-math jar, it gives me a compile error because >> of DenseVector. >> >> >> On Jan 30, 2012, at 10:42 PM, Prashant Kommireddi wrote: >> >>> How are you building the mapreduce jar? Try not to include the Mahout dist >>> while building MR jar, and include it only on "-libjars" option. >>> >>> On Mon, Jan 30, 2012 at 10:33 PM, Daniel Quach <danqu...@cs.ucla.edu> wrote: >>> >>>> I have been compiling my mapreduce with the jars in the classpath, and I >>>> believe I need to also add the jars as an option to -libjars to hadoop. >>>> However, even when I do this, I still get an error complaining about >>>> missing classes at runtime. (Compilation works fine). >>>> >>>> Here is my command: >>>> hadoop jar makevector.jar org.myorg.MakeVector -libjars >>>> /usr/local/mahout/math/target/mahout-math-0.6-SNAPSHOT.jar input/ output/ >>>> >>>> This is the error I receive: >>>> Exception in thread "main" java.lang.NoClassDefFoundError: >>>> org/apache/mahout/math/DenseVector >>>> >>>> I wonder if I am using the GenericOptionsParser incorrectly? I'm not sure >>>> if there is a deeper problem here. >>>> >> > -- Joseph Echeverria Cloudera, Inc. 443.305.9434