Hi
I'm a new Mahout user.
I tried running the follow command and got this exception - any idea why and
how to solve it?
$ hadoop jar mahout-core-0.5.jar
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
-Dmapred.input.dir=/user/xxx/input -Dmapred.output.dir=/user/xxx/output
--recommenderClassName
org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommender
--numRecommendations 10
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/commons/cli2/Option
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.apache.hadoop.util.RunJar.main(RunJar.java:179)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli2.Option
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 3 more
Thanks,
Dror
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