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From "Mat Kelcey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-694) IndexOutOfBoundException using build-reuters.sh
Date Fri, 20 May 2011 18:14:47 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036971#comment-13036971
] 

Mat Kelcey commented on MAHOUT-694:
-----------------------------------

in 0.4 it worked in both local mode and on a cluster and i think all the examples do
agree completely that this case hardly needs a cluster but if in 0.5 it only works in local
mode it'll be quite confusing to a new user who tries it with a cluster.
( the reason for failure is far from explicit )


> IndexOutOfBoundException using build-reuters.sh
> -----------------------------------------------
>
>                 Key: MAHOUT-694
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-694
>             Project: Mahout
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 0.5
>         Environment: Linux Debian Lenny
> Hadoop 0.20 (Cloudera)
>            Reporter: Allan BLANCHARD
>            Assignee: Drew Farris
>             Fix For: 0.5
>
>         Attachments: MAHOUT-694.patch
>
>
> I run Hadoop-0.20 on distributed mode on 10 VMs (NameNode + JobTracker + 8 DataNodes/TaskTrackers)
with Mahout trunk.
> I tried to test kmeans example with build-reuters.sh but I got an IndexOutOfBoundException
when it starts kmeans.
> I don't know which operation fails ... ExtractReuters, seqdirectory, seq2sparse or kmeans.
Maybe I forgot a configuration ? I searched on the web and didn't find solutions ... 
> ------------------------ UPDATE == 05/16 -------------------------
> NameNode:/usr/local/mahout/trunk/examples/bin# ./build-reuters.sh 
> Please select a number to choose the corresponding clustering algorithm
> 1. kmeans clustering
> 2. lda clustering
> Enter your choice : 1
> ok. You chose 1 and we'll use kmeans Clustering
> ./build-reuters.sh: line 39: cd: examples/bin/: No such file or directory
> Downloading Reuters-21578
>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
>                                  Dload  Upload   Total   Spent    Left  Speed
> 100 7959k  100 7959k    0     0   121k      0  0:01:05  0:01:05 --:--:--   99k
> Extracting...
> Running on hadoop, using HADOOP_HOME=/usr/lib/hadoop-0.20
> No HADOOP_CONF_DIR set, using /usr/lib/hadoop-0.20/src/conf 
> 11/05/16 09:31:20 WARN driver.MahoutDriver: No org.apache.lucene.benchmark.utils.ExtractReuters.props
found on classpath, will use command-line arguments only
> Deleting all files in ./examples/bin/work/reuters-out/-tmp
> 11/05/16 09:31:24 INFO driver.MahoutDriver: Program took 3471 ms
> Running on hadoop, using HADOOP_HOME=/usr/lib/hadoop-0.20
> No HADOOP_CONF_DIR set, using /usr/lib/hadoop-0.20/src/conf 
> 11/05/16 09:31:26 INFO common.AbstractJob: Command line arguments: {--charset=UTF-8,
--chunkSize=5, --endPhase=2147483647, --fileFilterClass=org.apache.mahout.text.PrefixAdditionFilter,
--input=./examples/bin/work/reuters-out/, --keyPrefix=, --output=./examples/bin/work/reuters-out-seqdir,
--startPhase=0, --tempDir=temp}
> 11/05/16 09:31:26 INFO driver.MahoutDriver: Program took 398 ms
> Running on hadoop, using HADOOP_HOME=/usr/lib/hadoop-0.20
> No HADOOP_CONF_DIR set, using /usr/lib/hadoop-0.20/src/conf 
> 11/05/16 09:31:28 INFO vectorizer.SparseVectorsFromSequenceFiles: Maximum n-gram size
is: 1
> 11/05/16 09:31:28 INFO vectorizer.SparseVectorsFromSequenceFiles: Minimum LLR value:
1.0
> 11/05/16 09:31:28 INFO vectorizer.SparseVectorsFromSequenceFiles: Number of reduce tasks:
1
> 11/05/16 09:31:29 INFO input.FileInputFormat: Total input paths to process : 1
> 11/05/16 09:31:29 INFO mapred.JobClient: Running job: job_201105160929_0001
> 11/05/16 09:31:30 INFO mapred.JobClient:  map 0% reduce 0%
> 11/05/16 09:31:40 INFO mapred.JobClient:  map 100% reduce 0%
> 11/05/16 09:31:42 INFO mapred.JobClient: Job complete: job_201105160929_0001
> [...]
> 11/05/16 09:33:58 INFO common.HadoopUtil: Deleting examples/bin/work/reuters-out-seqdir-sparse/partial-vectors-0
> 11/05/16 09:33:58 INFO driver.MahoutDriver: Program took 149846 ms
> Running on hadoop, using HADOOP_HOME=/usr/lib/hadoop-0.20
> No HADOOP_CONF_DIR set, using /usr/lib/hadoop-0.20/src/conf 
> 11/05/16 09:34:00 INFO common.AbstractJob: Command line arguments: {--clusters=./examples/bin/work/clusters,
--convergenceDelta=0.5, --distanceMeasure=org.apache.mahout.common.distance.SquaredEuclideanDistanceMeasure,
--endPhase=2147483647, --input=./examples/bin/work/reuters-out-seqdir-sparse/tfidf-vectors/,
--maxIter=10, --method=mapreduce, --numClusters=20, --output=./examples/bin/work/reuters-kmeans,
--overwrite=null, --startPhase=0, --tempDir=temp}
> 11/05/16 09:34:00 INFO util.NativeCodeLoader: Loaded the native-hadoop library
> 11/05/16 09:34:00 INFO zlib.ZlibFactory: Successfully loaded & initialized native-zlib
library
> 11/05/16 09:34:00 INFO compress.CodecPool: Got brand-new compressor
> Exception in thread "main" 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.mahout.clustering.kmeans.RandomSeedGenerator.buildRandom(RandomSeedGenerator.java:108)
> 	at org.apache.mahout.clustering.kmeans.KMeansDriver.run(KMeansDriver.java:101)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> 	at org.apache.mahout.clustering.kmeans.KMeansDriver.main(KMeansDriver.java:58)
> 	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:187)
> 	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:186)
> ------------------------------------------------------------------
> EDIT : I just tried this on Mahout 0.4 and it seems to work (I use the same VM configuration).

> PS : Sorry for my very bad english :(

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