Hi,
I am getting following exception when I try to run itemsimilarity from CL.
My input data is a text file which just has one line of text
Can any one please help me in resolving the error.
$ bin/mahout itemsimilarity -i D:/MahoutResult/ItemSimilarity/Input_Data -o
D:/MahoutResult/ItemSimilarity/Output -s DistributedUncen
teredCosineVectorSimilarity.class
Running on hadoop, using HADOOP_HOME=C:\cygwin\home\Divya\hadoop-0.20.2
HADOOP_CONF_DIR=C:\cygwin\home\Divya\hadoop-0.20.2\conf
10/11/26 15:43:50 INFO common.AbstractJob: Command line arguments:
{--booleanData=false, --endPhase=2147483647, --input=D:/MahoutResult
/ItemSimilarity/Input_Data, --maxCooccurrencesPerItem=100,
--maxSimilaritiesPerItem=100, --output=D:/MahoutResult/ItemSimilarity/Output
, --similarityClassname=DistributedUncenteredCosineVectorSimilarity.class,
--startPhase=0, --tempDir=temp}
10/11/26 15:43:51 INFO jvm.JvmMetrics: Initializing JVM Metrics with
processName=JobTracker, sessionId=
10/11/26 15:43:52 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:53 INFO mapred.JobClient: Running job: job_local_0001
10/11/26 15:43:53 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:53 INFO mapred.MapTask: io.sort.mb = 100
10/11/26 15:43:53 INFO mapred.MapTask: data buffer = 79691776/99614720
10/11/26 15:43:53 INFO mapred.MapTask: record buffer = 262144/327680
10/11/26 15:43:53 WARN mapred.LocalJobRunner: job_local_0001
java.lang.ArrayIndexOutOfBoundsException: 1
at
org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapp
er.java:47)
at
org.apache.mahout.cf.taste.hadoop.item.ItemIDIndexMapper.map(ItemIDIndexMapp
er.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.LocalJobRunner$Job.run(LocalJobRunner.java:177)
10/11/26 15:43:54 INFO mapred.JobClient: map 0% reduce 0%
10/11/26 15:43:54 INFO mapred.JobClient: Job complete: job_local_0001
10/11/26 15:43:54 INFO mapred.JobClient: Counters: 0
10/11/26 15:43:54 INFO jvm.JvmMetrics: Cannot initialize JVM Metrics with
processName=JobTracker, sessionId= - already initialized
10/11/26 15:43:55 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:55 INFO mapred.JobClient: Running job: job_local_0002
10/11/26 15:43:55 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:56 INFO mapred.MapTask: io.sort.mb = 100
10/11/26 15:43:56 INFO mapred.MapTask: data buffer = 79691776/99614720
10/11/26 15:43:56 INFO mapred.MapTask: record buffer = 262144/327680
10/11/26 15:43:56 WARN mapred.LocalJobRunner: job_local_0002
java.lang.NumberFormatException: For input string: "For a young person who
is years and above and below years he may be employed in an
industrial undertaking His employer however is required to notify "
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48
)
at java.lang.Long.parseLong(Long.java:410)
at java.lang.Long.parseLong(Long.java:468)
at
org.apache.mahout.cf.taste.hadoop.similarity.item.CountUsersMapper.map(Count
UsersMapper.java:40)
at
org.apache.mahout.cf.taste.hadoop.similarity.item.CountUsersMapper.map(Count
UsersMapper.java:31)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
10/11/26 15:43:56 INFO mapred.JobClient: map 0% reduce 0%
10/11/26 15:43:56 INFO mapred.JobClient: Job complete: job_local_0002
10/11/26 15:43:56 INFO mapred.JobClient: Counters: 0
10/11/26 15:43:56 INFO jvm.JvmMetrics: Cannot initialize JVM Metrics with
processName=JobTracker, sessionId= - already initialized
10/11/26 15:43:57 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:57 INFO mapred.JobClient: Running job: job_local_0003
10/11/26 15:43:57 INFO input.FileInputFormat: Total input paths to process :
2
10/11/26 15:43:57 INFO mapred.MapTask: io.sort.mb = 100
10/11/26 15:43:57 INFO mapred.MapTask: data buffer = 79691776/99614720
10/11/26 15:43:57 INFO mapred.MapTask: record buffer = 262144/327680
10/11/26 15:43:58 WARN mapred.LocalJobRunner: job_local_0003
java.lang.NumberFormatException: For input string: "For a young person who
is years and above and below years he may be employed in an
industrial undertaking His employer however is required to notify "
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48
)
at java.lang.Long.parseLong(Long.java:410)
at java.lang.Long.parseLong(Long.java:468)
at
org.apache.mahout.cf.taste.hadoop.ToEntityPrefsMapper.map(ToEntityPrefsMappe
r.java:57)
at
org.apache.mahout.cf.taste.hadoop.ToEntityPrefsMapper.map(ToEntityPrefsMappe
r.java:30)
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.LocalJobRunner$Job.run(LocalJobRunner.java:177)
10/11/26 15:43:58 INFO mapred.JobClient: map 0% reduce 0%
10/11/26 15:43:58 INFO mapred.JobClient: Job complete: job_local_0003
10/11/26 15:43:58 INFO mapred.JobClient: Counters: 0
10/11/26 15:43:58 INFO jvm.JvmMetrics: Cannot initialize JVM Metrics with
processName=JobTracker, sessionId= - already initialized
10/11/26 15:43:59 INFO input.FileInputFormat: Total input paths to process :
0
10/11/26 15:43:59 INFO mapred.LocalJobRunner:
10/11/26 15:43:59 INFO mapred.JobClient: Running job: job_local_0004
10/11/26 15:43:59 INFO input.FileInputFormat: Total input paths to process :
0
10/11/26 15:43:59 WARN mapred.LocalJobRunner: job_local_0004
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:124)
10/11/26 15:44:00 INFO mapred.JobClient: map 0% reduce 0%
10/11/26 15:44:00 INFO mapred.JobClient: Job complete: job_local_0004
10/11/26 15:44:00 INFO mapred.JobClient: Counters: 0
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at
org.apache.mahout.cf.taste.hadoop.TasteHadoopUtils.readIntFromFile(TasteHado
opUtils.java:103)
at
org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob.run(Item
SimilarityJob.java:187)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at
org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob.main(Ite
mSimilarityJob.java:92)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver
.java:68)
at
org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:184)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
Thanks
Regards,
Divya
