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https://issues.apache.org/jira/browse/MAHOUT-1367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13836010#comment-13836010
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Suneel Marthi commented on MAHOUT-1367:
---------------------------------------
The original issue that's been reported could have been caused by a wrong path
for the input file and the present implementation doesn't check if the input
file exists before trying to read from the file which throws the reported stack
trace. Committing a patch to validate that the input file path exists before
trying to read from the file.
> WikipediaXmlSplitter --> Exception in thread "main"
> java.lang.NullPointerException
> ----------------------------------------------------------------------------------
>
> Key: MAHOUT-1367
> URL: https://issues.apache.org/jira/browse/MAHOUT-1367
> Project: Mahout
> Issue Type: Bug
> Affects Versions: 0.8
> Environment: ubuntu
> Reporter: ollagnier
> Assignee: Suneel Marthi
> Priority: Minor
> Fix For: 0.9
>
> Attachments: MAHOUT-1367.patch
>
>
> Hi !
> When I run this command : $MAHOUT_HOME/bin/mahout
> org.apache.mahout.text.wikipedia.WikipediaXmlSplitter -d
> frwiki-latest-pages-articles.xml.bz2 -o wikipedia-xml-chunks -c 100
> I have this error :
> MAHOUT-JOB:
> /home/ollagnier/Documents/tools/mahout-distribution-0.8/bin/trunk/examples/target/mahout-examples-0.9-SNAPSHOT-job.jar
> 13/11/29 14:51:08 WARN driver.MahoutDriver: No
> org.apache.mahout.text.wikipedia.WikipediaXmlSplitter.props found on
> classpath, will use command-line arguments only
> 13/11/29 14:51:08 WARN util.NativeCodeLoader: Unable to load native-hadoop
> library for your platform... using builtin-java classes where applicable
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.hadoop.io.compress.bzip2.Bzip2Factory.isNativeBzip2Loaded(Bzip2Factory.java:54)
> at
> org.apache.hadoop.io.compress.bzip2.Bzip2Factory.getBzip2Decompressor(Bzip2Factory.java:131)
> at
> org.apache.hadoop.io.compress.BZip2Codec.createDecompressor(BZip2Codec.java:250)
> at
> org.apache.hadoop.io.compress.BZip2Codec.createInputStream(BZip2Codec.java:156)
> at
> org.apache.mahout.text.wikipedia.WikipediaXmlSplitter.main(WikipediaXmlSplitter.java:190)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
> 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: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:212)
> And I have a little trouble seeing where it comes from
> Thank you for your help
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