I've found the problem. The separator should be comma. When I use space with separator , I got the those errors. Thanks everyone for helping me. I will pay attention on separator next time.
[Successful Log] =============================================================== [hadoop@localhost test]$ cat rec5 1,101 1,102 1,103 2,101 2,102 2,103 2,104 3,101 3,104 3,105 3,107 4,101 4,103 4,104 4,106 5,101 5,102 5,103 5,104 5,105 5,106 [hadoop@localhost test]$ hadoop fs -cat rec5/rec5 1,101 1,102 1,103 2,101 2,102 2,103 2,104 3,101 3,104 3,105 3,107 4,101 4,103 4,104 4,106 5,101 5,102 5,103 5,104 5,105 5,106 [hadoop@localhost test]$ hadoop jar /usr/lib/mahout/mahout-core-0.7-cdh4.2.1-job.jar org.apache.mahout.cf.taste.hadoop.item.RecommenderJob -i rec5 -o rec_result5 -s SIMILARITY_LOGLIKELIHOOD [hadoop@localhost test]$ hadoop fs -ls rec_result5 Found 2 items -rw-r--r-- 1 hadoop supergroup 0 2013-05-12 14:01 rec_result5/_SUCCESS -rw-r--r-- 1 hadoop supergroup 108 2013-05-12 14:01 rec_result5/part-r-00000 [hadoop@localhost test]$ hadoop fs -cat rec_result5/part-r-00000 1 [106:1.0,105:1.0,104:1.0] 2 [106:1.0,105:1.0] 3 [106:1.0,103:1.0,102:1.0] 4 [105:1.0,102:1.0] 5 [107:1.0] =============================================================== 2013/5/10 滝口倫理 <rinri1...@gmail.com> > I would like to get recommended items by using RecommenderJob. > The input data I made is as below. There aren't preference value on > purpose. > > When I run RecommenderJob, I got some errors. > > Does it mean I have to prepare the preference value for input file? > I want to do RecommenderJob without preference value. > > Regards > Takiguchi > > > [mahout command] > =========================================================== > > [hadoop@localhost test]$ cat rere2 > 1 101 > 1 102 > 1 103 > 2 101 > 2 102 > 2 103 > 2 104 > 3 101 > 3 104 > 3 105 > 3 107 > 4 101 > 4 103 > 4 104 > 4 106 > 5 101 > 5 102 > 5 103 > 5 104 > 5 105 > 5 106 > > [hadoop@localhost test]$ hadoop fs -mkdir recommend2_in > > [hadoop@localhost test]$ hadoop fs -put rere2 recommend2_in > > [hadoop@localhost test]$ hadoop jar > /usr/lib/mahout/mahout-core-0.7-cdh4.2.1-job.jar \ > org.apache.mahout.cf.taste.hadoop.item.RecommenderJob \ > -i recommend2_in -o rec_out -s SIMILARITY_LOGLIKELIHOOD \ > -b true > =========================================================== > > > [Error] > > ============================================================================= > > > 13/05/10 20:15:54 INFO mapreduce.Job: Task Id : > attempt_1368183830239_0002_m_000000_0, Status : FAILED > Error: java.lang.ArrayIndexOutOfBoundsException: 1 > at > org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:47) > at > org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapper.java:31) > > 13/05/10 20:16:02 INFO mapreduce.Job: Task Id : > attempt_1368183830239_0002_m_000000_1, Status : FAILED > Error: java.lang.ArrayIndexOutOfBoundsException: 1 > > 13/05/10 20:16:10 INFO mapreduce.Job: Task Id : > attempt_1368183830239_0002_m_000000_2, Status : FAILED > Error: java.lang.ArrayIndexOutOfBoundsException: 1 > > 13/05/10 20:16:18 INFO mapreduce.Job: Counters: 6 > Job Counters > Failed map tasks=4 > Launched map tasks=4 > Other local map tasks=3 > Rack-local map tasks=1 > Total time spent by all maps in occupied slots (ms)=26266 > Total time spent by all reduces in occupied slots (ms)=0 > Exception in thread "main" java.io.FileNotFoundException: File does not > exist: /user/hadoop/temp/preparePreferenceMatrix/numUsers.bin > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsUpdateTimes(FSNamesystem.java:1312) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsInt(FSNamesystem.java:1258) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1231) > > > > > ============================================================================= >
