Hi all, I am trying to run a RecommenderJob from a Java program. I have added the files users.txt and input.txt to a Hadoop VM and use the run-method of RecommenderJob to start the calculation. But the the following error message occurs while running the MapReducer:
Error: java.lang.ClassNotFoundException: com.google.common.primitives.Longs at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.apache.mahout.cf.taste.hadoop.TasteHadoopUtils.idToIndex(TasteHadoopUtils.java:61) at org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:48) at org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:31) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305) at org.apache.hadoop.mapred.Child.main(Child.java:170) I have added the required guava-r09.jar explicitly to my jar which also lays on the hadoop cluster. This may be a stupid question, but does anyone know where this error comes from? This would help me a lot. Thanks and greetings, Janina
