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https://issues.apache.org/jira/browse/MAHOUT-1129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13535269#comment-13535269
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Suneel Marthi edited comment on MAHOUT-1129 at 12/18/12 8:27 PM:
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Did u try running the example by increasing the JVM memory settings ?
was (Author: smarthi):
Did u try running the example by setting the JVM memory settings ?
> Mahout Java Heap Out of Memory in TrainNewsGroup class
> ------------------------------------------------------
>
> Key: MAHOUT-1129
> URL: https://issues.apache.org/jira/browse/MAHOUT-1129
> Project: Mahout
> Issue Type: Bug
> Components: Classification, Examples
> Affects Versions: 0.7
> Environment: Linux - RHEL 5.6
> Reporter: Huned Lokhandwala
> Priority: Critical
> Labels: test
> Fix For: 0.7
>
>
> On Mahout on Linux RHEL 5.6 (Single node, no cluster), a Java Heap Space Out
> of Memory Exception occurs when calling the TrainNewsGroup class from the
> mahout-examples-0.7.0.17-job.jar file. I downloaded the 20news-bydate.tar.gz
> (from http://people.csail.mit.edu/jrennie/20Newsgroups/20news-bydate.tar.gz )
> to use as classification data and added it in the folder as below, and called
> the org.apache.mahout.classifier.sgd.TrainNewsGroups on the folder and found
> the Java Heap Space Out of Memory Exception as show below.
> Output from run:
> > /usr/lib/mahout/bin/mahout org.apache.mahout.classifier.sgd.TrainNewsGroups
> > /artifacts/mahout_sgd_classifier/20news-bydate-train
> Running on hadoop, using /usr/bin/hadoop and HADOOP_CONF_DIR=
> MAHOUT-JOB: /usr/lib/mahout/mahout-examples-0.7.0.17-job.jar
> 12/12/17 20:35:06 WARN driver.MahoutDriver: No
> org.apache.mahout.classifier.sgd.TrainNewsGroups.props found on classpath,
> will use command-line arguments only
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
> at org.apache.mahout.math.DenseMatrix.<init>(DenseMatrix.java:50)
> at
> org.apache.mahout.classifier.sgd.OnlineLogisticRegression.<init>(OnlineLogisticRegression.java:60)
> at
> org.apache.mahout.classifier.sgd.CrossFoldLearner.<init>(CrossFoldLearner.java:67)
> at
> org.apache.mahout.classifier.sgd.CrossFoldLearner.copy(CrossFoldLearner.java:217)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression$Wrapper.copy(AdaptiveLogisticRegression.java:399)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression$Wrapper.copy(AdaptiveLogisticRegression.java:386)
> at org.apache.mahout.ep.State.copy(State.java:94)
> at org.apache.mahout.ep.State.mutate(State.java:114)
> at
> org.apache.mahout.ep.EvolutionaryProcess.initializePopulation(EvolutionaryProcess.java:103)
> at
> org.apache.mahout.ep.EvolutionaryProcess.<init>(EvolutionaryProcess.java:97)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression.setupOptimizer(AdaptiveLogisticRegression.java:279)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression.setPoolSize(AdaptiveLogisticRegression.java:265)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression.<init>(AdaptiveLogisticRegression.java:121)
> at
> org.apache.mahout.classifier.sgd.AdaptiveLogisticRegression.<init>(AdaptiveLogisticRegression.java:100)
> at
> org.apache.mahout.classifier.sgd.TrainNewsGroups.main(TrainNewsGroups.java:100)
> 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:195)
> 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)
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