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From Peng Zhang <pzhang.x...@gmail.com>
Subject Re: easy recommender question
Date Tue, 05 Aug 2014 10:46:47 GMT
Hi,

Please try to upload your input file test.txt to HDFS (Hadoop File System), and run again.


Peng Zhang

--
Sent from my iPhone

> On Aug 5, 2014, at 5:59 PM, François Bossière <francois.bossiere@gmail.com> wrote:
> 
> Hi,
> 
> I am discovering Mahout which I installed on a mapr cluster using the mapr-mahout package.
> I try some very little test on recommenders:
> My input is the following $MAHOUT_HOME/input/test.txt:
> 0,1,4
> 0,4,2
> 5,1,2
> 5,4,3
> 5,7,5
> 8,1,2
> 8,7,1
> 
> I go in $MAHOUT_HOME and I run:
> mahout recommenditembased -s SIMILARITY_PEARSON_CORRELATION -i input/test.txt -o output
--numRecommendations 5
> 
> I get the following error message:
> 
> No MAHOUT_CONF_DIR found
> Running on hadoop, using /opt/mapr/hadoop/hadoop-0.20.2/bin/hadoop and HADOOP_CONF_DIR=
> MAHOUT-JOB: /opt/mapr/mahout/mahout-0.9/mahout-examples-0.9-mapr-job.jar
> 14/08/05 09:53:53 WARN driver.MahoutDriver: No recommenditembased.props found on classpath,
will use command-line arguments only
> 14/08/05 09:53:54 INFO common.AbstractJob: Command line arguments: {--booleanData=[false],
--endPhase=[2147483647], --input=[input/test.txt], --maxPrefsInItemSimilarity=[500], --maxPrefsPerUser=[10],
--maxSimilaritiesPerItem=[100], --minPrefsPerUser=[1], --numRecommendations=[5], --output=[output],
--similarityClassname=[SIMILARITY_PEARSON_CORRELATION], --startPhase=[0], --tempDir=[temp]}
> 14/08/05 09:53:54 INFO common.AbstractJob: Command line arguments: {--booleanData=[false],
--endPhase=[2147483647], --input=[input/test.txt], --minPrefsPerUser=[1], --output=[temp/preparePreferenceMatrix],
--ratingShift=[0.0], --startPhase=[0], --tempDir=[temp]}
> 14/08/05 09:53:54 INFO fs.JobTrackerWatcher: Current running JobTracker is: fb-mapr1.c.mindful-origin-252.internal/10.240.1.96:9001
> 14/08/05 09:53:54 INFO mapred.JobClient: Cleaning up the staging area maprfs:/var/mapr/cluster/mapred/jobTracker/staging/mapr/.staging/job_201408041502_0035
> Exception in thread "main" org.apache.hadoop.mapreduce.lib.input.InvalidInputException:
Input path does not exist: input/test.txt
>        at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:248)
>        at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:273)
>        at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1033)
>        at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1050)
>        at org.apache.hadoop.mapred.JobClient.access$500(JobClient.java:173)
>        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:934)
>        at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:885)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at javax.security.auth.Subject.doAs(Subject.java:415)
>        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127)
>        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:885)
>        at org.apache.hadoop.mapreduce.Job.submit(Job.java:573)
>        at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:603)
>        at org.apache.mahout.cf.taste.hadoop.preparation.PreparePreferenceMatrixJob.run(PreparePreferenceMatrixJob.java:77)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>        at org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.run(RecommenderJob.java:164)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
>        at org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.main(RecommenderJob.java:322)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>        at java.lang.reflect.Method.invoke(Method.java:606)
>        at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
>        at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
>        at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195)
>        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:606)
>        at org.apache.hadoop.util.RunJar.main(RunJar.java:197)
> 
> Precision: i set MAHOUT_CONF_DIR=/opt/mapr/mahout/mahout-0.9/conf.new because I did not
know how to set it.
> Can you help me solve this very frustrating problem?
> 

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