Ok, im searching for that, but first of all, before that error i see
java.lang.IllegalStateException: java.lang.NoSuchMethodException:
org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommender.<init>(org.apache.mahout.cf.taste.model.DataModel)
at
org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderReducer.setup(RecommenderReducer.java:81)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:174)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:566)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:216)
Caused by: java.lang.NoSuchMethodException:
org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommender.<init>(org.apache.mahout.cf.taste.model.DataModel)
at java.lang.Class.getConstructor0(Class.java:2706)
at java.lang.Class.getConstructor(Class.java:1657)
at
org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderReducer.setup(RecommenderReducer.java:78)
... 4 more
10/11/20 12:21:50 INFO mapred.JobClient: Job complete: job_local_0001
10/11/20 12:21:50 INFO mapred.JobClient: Counters: 14
10/11/20 12:21:50 INFO mapred.JobClient: FileSystemCounters
10/11/20 12:21:50 INFO mapred.JobClient: FILE_BYTES_READ=17546530
10/11/20 12:21:50 INFO mapred.JobClient: HDFS_BYTES_READ=34695906
10/11/20 12:21:50 INFO mapred.JobClient: FILE_BYTES_WRITTEN=11751492
10/11/20 12:21:50 INFO mapred.JobClient: HDFS_BYTES_WRITTEN=17542312
10/11/20 12:21:50 INFO mapred.JobClient: Map-Reduce Framework
10/11/20 12:21:50 INFO mapred.JobClient: Reduce input groups=0
10/11/20 12:21:50 INFO mapred.JobClient: Combine output records=0
10/11/20 12:21:50 INFO mapred.JobClient: Map input records=1000209
10/11/20 12:21:50 INFO mapred.JobClient: Reduce shuffle bytes=0
10/11/20 12:21:50 INFO mapred.JobClient: Reduce output records=0
10/11/20 12:21:50 INFO mapred.JobClient: Spilled Records=2000418
10/11/20 12:21:50 INFO mapred.JobClient: Map output bytes=1990807
10/11/20 12:21:50 INFO mapred.JobClient: Combine input records=0
10/11/20 12:21:50 INFO mapred.JobClient: Map output records=1000209
10/11/20 12:21:50 INFO mapred.JobClient: Reduce input records=0
So is a problem about the class i think, well my command line is:
../hadoop/bin/hadoop jar core/target/mahout-core-0.5-SNAPSHOT.job.jar
org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderJob -i input/ratings.txt -o
data/ratings4 --recommenderClassName
org.apache.mahout.cf.taste.impl.recommender.GenericItemBasedRecommender
Thanks again
Il giorno 20/nov/2010, alle ore 12.07, Sean Owen ha scritto:
> Sorry but that's something to do with Hadoop, not Mahout. It seems like an
> error in your HDFS cluster.
>
> On Sat, Nov 20, 2010 at 10:41 AM, Stefano Bellasio <
> [email protected]> wrote:
>
>> Ok Sean, thank you, works very well :) Now when i run hadoop with that
>> before finish it say this:
>>
>>
