Boa noite ao executar a segunda etapa do curso tive o erro abaixo. Podem me ajudar, por favor.
log4j:WARN No appenders could be found for logger (org.apache.mahout.cf.taste.impl.model.file.FileDataModel).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/mahout/common/RandomUtils
at org.apache.mahout.cf.taste.impl.common.FastByIDMap.<init>(FastByIDMap.java:90)
at org.apache.mahout.cf.taste.impl.common.FastByIDMap.<init>(FastByIDMap.java:70)
at org.apache.mahout.cf.taste.impl.common.FastByIDMap.<init>(FastByIDMap.java:58)
at org.apache.mahout.cf.taste.impl.model.file.FileDataModel.buildModel(FileDataModel.java:250)
at org.apache.mahout.cf.taste.impl.model.file.FileDataModel.reload(FileDataModel.java:230)
at org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:220)
at org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:167)
at org.apache.mahout.cf.taste.impl.model.file.FileDataModel.<init>(FileDataModel.java:147)
at br.fsp.bg.RecomendaProdutos.main(RecomendaProdutos.java:25)
Caused by: java.lang.ClassNotFoundException: org.apache.mahout.common.RandomUtils
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 9 more
