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在Hadoop上運行Mahout時出現以下錯誤。Mahout:輸出文件在Hadoop中發生錯誤
命令:
mahout recommenditembased -s SIMILARITY_LOGLIKELIHOOD -i /user/inp -o /user/op --numRecommendations 5
錯誤:
Running on hadoop, using /usr/local/hadoop/bin/hadoop and HADOOP_CONF_DIR=
MAHOUT-JOB: /opt/apache-mahout-distribution- 0.11.0/examples/target/mahout-examples-0.11.0-job.jar
15/11/05 17:52:29 INFO AbstractJob: Command line arguments: {--booleanData=[false], --endPhase=[2147483647], --input=[/user/inp], --maxPrefsInItemSimilarity=[500], --maxPrefsPerUser=[10], --maxSimilaritiesPerItem=[100], --minPrefsPerUser=[1], --numRecommendations=[5], --output=[/user/], --similarityClassname=[SIMILARITY_LOGLIKELIHOOD], --startPhase=[0], --tempDir=[temp]}
15/11/05 17:52:29 INFO AbstractJob: Command line arguments: {--booleanData=[false], --endPhase=[2147483647], --input=[/user/inp], --minPrefsPerUser=[1], --output=[temp/preparePreferenceMatrix], --ratingShift=[0.0], --startPhase=[0], --tempDir=[temp]}
15/11/05 17:52:30 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
15/11/05 17:52:30 INFO deprecation: mapred.input.dir is deprecated. Instead, use mapreduce.input.fileinputformat.inputdir
15/11/05 17:52:30 INFO deprecation: mapred.compress.map.output is deprecated. Instead, use mapreduce.map.output.compress
15/11/05 17:52:30 INFO deprecation: mapred.output.dir is deprecated. Instead, use mapreduce.output.fileoutputformat.outputdir
15/11/05 17:52:30 INFO deprecation: session.id is deprecated. Instead, use dfs.metrics.session-id
15/11/05 17:52:30 INFO JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId=
Exception in thread "main" org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory temp/preparePreferenceMatrix/itemIDIndex already exists
但我找不到創建的任何輸出文件夾:
hadoop fs -ls/
15/11/05 17:55:40 WARN util.NativeCodeLoader: Unable to load native- hadoop library for your platform... using builtin-java classes where applicable
Found 1 items
drwxr-xr-x - hduser supergroup 0 2015-11-05 17:47 /user
如何解決這個問題?
Mahout版本:0.11.0
就像消息說的那樣,您需要先從HDFS中刪除目錄,然後運行該腳本。 – Ambrish