After adding lined-sinple-sorted.txt and users.txt in input directory of
hdfs.
I am trying to run the following command.
hduser@ubuntu:/usr/local/hadoop$ bin/hadoop jar
/opt/mahout/core/target/mahout-core-0.7-SNAPSHOT-job.jar
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
-Dmapred.input.dir=input/input.txt -Dmapred.output.dir=output
--similarityClassname SIMILARITY_PEARSON_CORRELATION --usersFile
input/users.txt --booleanData
then i got the following error:
12/03/02 06:17:06 INFO common.AbstractJob: Command line arguments:
{--booleanData=[false], --endPhase=[2147483647], --maxPrefsPerUser=[10],
--maxPrefsPerUserInItemSimilarity=[1000], --maxSimilaritiesPerItem=[100],
--minPrefsPerUser=[1], --numRecommendations=[10],
--similarityClassname=[SIMILARITY_PEARSON_CORRELATION], --startPhase=[0],
--tempDir=[temp], --usersFile=[input/users.txt]}
12/03/02 06:17:06 INFO common.AbstractJob: Command line arguments:
{--booleanData=[false], --endPhase=[2147483647], --input=[input/input.txt],
--maxPrefsPerUser=[1000], --minPrefsPerUser=[1],
--output=[temp/preparePreferenceMatrix], --ratingShift=[0.0],
--startPhase=[0], --tempDir=[temp]}
12/03/02 06:17:07 INFO input.FileInputFormat: Total input paths to process
: 1
12/03/02 06:17:08 INFO mapred.JobClient: Running job: job_201203020113_0018
12/03/02 06:17:09 INFO mapred.JobClient: map 0% reduce 0%
12/03/02 06:17:23 INFO mapred.JobClient: Task Id :
attempt_201203020113_0018_m_000000_0, Status : FAILED
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)
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)
12/03/02 06:17:29 INFO mapred.JobClient: Task Id :
attempt_201203020113_0018_m_000000_1, Status : FAILED
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)
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)
12/03/02 06:17:35 INFO mapred.JobClient: Task Id :
attempt_201203020113_0018_m_000000_2, Status : FAILED
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)
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)
12/03/02 06:17:44 INFO mapred.JobClient: Job complete: job_201203020113_0018
12/03/02 06:17:44 INFO mapred.JobClient: Counters: 3
12/03/02 06:17:44 INFO mapred.JobClient: Job Counters
12/03/02 06:17:44 INFO mapred.JobClient: Launched map tasks=4
12/03/02 06:17:44 INFO mapred.JobClient: Data-local map tasks=4
12/03/02 06:17:44 INFO mapred.JobClient: Failed map tasks=1
Exception in thread "main" java.io.IOException: Cannot open filename
/user/hduser/temp/preparePreferenceMatrix/numUsers.bin
at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1497)
at
org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1488)
at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:376)
at
org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:178)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:356)
at org.apache.mahout.common.HadoopUtil.readInt(HadoopUtil.java:267)
at
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.run(RecommenderJob.java:162)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at
org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.main(RecommenderJob.java:293)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
what i have to do to come out from this error?(is it possible then write
command)
Your help will be appreciated.
--
MANISH DUNANI
-THANX
manishd...@gmail.com
