Re: SparseVectorsFromSequenceFiles StandardAnalyzer ClassNotFoundException issue

[Terry Blankers]

Hi Suneel, can you please provide a little more detail since I still 
can't get this to work.

Which classpath are the Lucene jars supposed to be added to? my java 
project? or the Hadoop instance?

Thanks,

Terry


On 6/3/14, 5:35 PM, Terry Blankers wrote:
Thanks Suneel. I thought having the jar as a dependency and the class 
imported was enough.


On 6/3/14, 4:18 PM, Suneel Marthi wrote:
You r missing the Lucene jars from ur classpath. Mahout's presently 
at Lucene 4.6.1 that's what u should be including.



On Tuesday, June 3, 2014 3:40 PM, Terry Blankers 
<te...@amritanet.com> wrote:


Hello, can anyone please give me a clue as to what I may be missing 
here?

I'm trying to run a SparseVectorsFromSequenceFiles job via ToolRunner
from a java project and I'm getting the following exception:

Error: java.lang.ClassNotFoundException:
org.apache.lucene.analysis.standard.StandardAnalyzer
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
      at
org.apache.mahout.vectorizer.document.SequenceFileTokenizerMapper.setup(SequenceFileTokenizerMapper.java:62) 

      at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
      at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
      at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
      at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:415)
      at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) 

      at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)


I've tried adding the location of lucene-analyzers-common-4.6.1.jar to
my hadoop classpath which doesn't make any difference.


I'm running against Hadoop 2.2 and Mahout trunk, compiled with:

      mvn clean install  -Dhadoop2.version=2.2.0 -DskipTests


I'm trying to run the job like this:

      String[] args = {"--input","/input/index"
              ,"--output","/output/vectors"
              ,"--maxNGramSize","3"
              ,"--namedVector", "--overwrite"
      };
      SparseVectorsFromSequenceFiles sparse = new
SparseVectorsFromSequenceFiles();
      ToolRunner.run(configuration, sparse, args);


Running seq2sparse from the commandline works successfully with no
exceptions:

      $MAHOUT_HOME/bin/mahout seq2sparse -i /input/index 
--namedVector -o
/output/vectors -ow --maxNGramSize 3


Many thanks,

Terry