项推荐象夫Java错误

我试图做一个项目根据建议，但我得到这个错误：项推荐象夫Java错误

Lore:~ lorenzoferri$ mahout parallelALS --input prova1.csv --output output.csv --lambda 0.1 --implicitFeedback true --alpha 0.8 --numFeatures 2 --numIterations 5 --numThreadsPerSolver 1 --tempDir tmp 
No MAHOUT_CONF_DIR found 
Running on hadoop, using /usr/local/bin/hadoop and HADOOP_CONF_DIR= 
MAHOUT-JOB: /usr/local/Cellar/mahout/0.9/libexec/mahout-examples-0.9-job.jar 
15/02/09 17:32:25 WARN driver.MahoutDriver: No parallelALS.props found on classpath, will use command-line arguments only 
15/02/09 17:32:26 INFO common.AbstractJob: Command line arguments: {--alpha=[0.8], --endPhase=[2147483647], --implicitFeedback=[true], --input=[prova1.csv], --lambda=[0.1], --numFeatures=[2], --numIterations=[5], --numThreadsPerSolver=[1], --output=[output.csv], --startPhase=[0], --tempDir=[tmp]} 
15/02/09 17:32:26 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 
15/02/09 17:32:26 INFO Configuration.deprecation: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir 
15/02/09 17:32:26 INFO Configuration.deprecation: mapred.compress.map.output is deprecated. Instead, use mapreduce.map.output.compress 
15/02/09 17:32:26 INFO Configuration.deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir 
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected 
    at org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:174) 
    at org.apache.mahout.common.AbstractJob.prepareJob(AbstractJob.java:614) 
    at org.apache.mahout.cf.taste.hadoop.als.ParallelALSFactorizationJob.run(ParallelALSFactorizationJob.java:166) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) 
    at org.apache.mahout.cf.taste.hadoop.als.ParallelALSFactorizationJob.main(ParallelALSFactorizationJob.java:113) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71) 
    at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144) 
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:152) 
    at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221) 
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136) 
Lore:~ lorenzoferri$

我也试过：

Lore:~ lorenzoferri$ mahout recommenditembased -i '/Users/lorenzoferri/Desktop/prova1.csv' -o '/Users/lorenzoferri/Desktop/output.csv' -n 100 -s SIMILARITY_COOCCURRENCE 
No MAHOUT_CONF_DIR found 
Running on hadoop, using /usr/local/bin/hadoop and HADOOP_CONF_DIR= 
MAHOUT-JOB: /usr/local/Cellar/mahout/0.9/libexec/mahout-examples-0.9-job.jar 
15/02/09 17:37:02 WARN driver.MahoutDriver: No recommenditembased.props found on classpath, will use command-line arguments only 
15/02/09 17:37:02 INFO common.AbstractJob: Command line arguments: {--booleanData=[false], --endPhase=[2147483647], --input=[/Users/lorenzoferri/Desktop/prova1.csv], --maxPrefsInItemSimilarity=[500], --maxPrefsPerUser=[10], --maxSimilaritiesPerItem=[100], --minPrefsPerUser=[1], --numRecommendations=[100], --output=[/Users/lorenzoferri/Desktop/output.csv], --similarityClassname=[SIMILARITY_COOCCURRENCE], --startPhase=[0], --tempDir=[temp]} 
15/02/09 17:37:02 INFO common.AbstractJob: Command line arguments: {--booleanData=[false], --endPhase=[2147483647], --input=[/Users/lorenzoferri/Desktop/prova1.csv], --minPrefsPerUser=[1], --output=[temp/preparePreferenceMatrix], --ratingShift=[0.0], --startPhase=[0], --tempDir=[temp]} 
15/02/09 17:37:03 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 
15/02/09 17:37:03 INFO Configuration.deprecation: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir 
15/02/09 17:37:03 INFO Configuration.deprecation: mapred.compress.map.output is deprecated. Instead, use mapreduce.map.output.compress 
15/02/09 17:37:03 INFO Configuration.deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir 
Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected 
    at org.apache.mahout.common.HadoopUtil.getCustomJobName(HadoopUtil.java:174) 
    at org.apache.mahout.common.AbstractJob.prepareJob(AbstractJob.java:614) 
    at org.apache.mahout.cf.taste.hadoop.preparation.PreparePreferenceMatrixJob.run(PreparePreferenceMatrixJob.java:73) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) 
    at org.apache.mahout.cf.taste.hadoop.item.RecommenderJob.run(RecommenderJob.java:164) 
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) 
    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:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71) 
    at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144) 
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:152) 
    at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221) 
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

我通过BREW装象夫，在Mac os x 10.10，但我在Ubuntu上遇到了同样的问题。在网上我只能在eclipse上找到教程，但我想通过终端运行它。

来源

2015-02-09 Lorenzo L. Ferri

No MAHOUT_CONF_DIR found 添加到你的.bash_profile或.zshrc：
- export MAHOUT=/path/to/mahout
- export MAHOUT_CONF_DIR=$MAHOUT_HOME/conf
为了运行Mahout的本地添加到你的.bash_profile或者。 zshrc：
- export MAHOUT_LOCAL="not-an-empty-string"
设置为空字符串以外的任何强制亨利马乌到本地运行
即使HADOOP_CONF_DIR和HADOOP_HOME设置。

为了获得快速启动和运行，我会为你推荐：

下载象夫为tar.gz：提到http://apache.mivzakim.net/mahout/0.9/mahout-distribution-0.9.tar.gz
按照步骤1和2， /path/to/mahout是你提取的地方mahout-distribution-0.9
运行mahout命令fr OM mahout-distribution-0.9/bin/mahout
即：./bin/mahout recommenditembased -i '/Users/lorenzoferri/Desktop/prova1.csv' -o '/Users/lorenzoferri/Desktop/output.csv' -n 100 -s SIMILARITY_COOCCURRENCE
在mahout-distribution-0.9/examples可以运行，并探讨一些shell脚本

https://svn.apache.org/repos/asf/mahout/trunk/bin/mahout

来源

2015-03-18 02:32:13 karopastal

'$ MAHOUT_HOME'设置是什么？ – user2635088 2015-05-02 07:36:17

指向提取的tar.gz，例如 '''MAHOUT_HOME =〜/ machine_learning/mahout-distribution-0.9''' – karopastal 2015-05-03 10:42:03

项推荐象夫Java错误

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