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https://issues.apache.org/jira/browse/MAHOUT-1123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13526087#comment-13526087
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Chris Birchall commented on MAHOUT-1123:
----------------------------------------
Sorry, I forgot to 'svn add' the most important file! I^ve updated the patch.
> Support Lucene 3.6 analyzers for vectorization
> ----------------------------------------------
>
> Key: MAHOUT-1123
> URL: https://issues.apache.org/jira/browse/MAHOUT-1123
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.7
> Reporter: Chris Birchall
> Attachments: support-lucene36-analyzers.patch
>
>
> Passing a Lucene analyzer class name to Mahout (e.g. seq2sparse
> --analyzerName) results in failure with the error shown below.
> This is caused by Mahout trying to instantiate the analyzer using a
> zero-argument constructor. The zero-arg constructors were removed from the
> standard Lucene analyzers in Lucene 3.6 (if I recall correctly).
> This patch adds support for the new one-arg constructors, as well as keeping
> support for the legacy analyzers.
> =====
> Exception in thread "main" java.lang.IllegalStateException:
> java.lang.NoSuchMethodException:
> org.apache.lucene.analysis.standard.StandardAnalyzer.<init>()
> at
> org.apache.mahout.common.ClassUtils.instantiateAs(ClassUtils.java:68)
> at
> org.apache.mahout.vectorizer.SparseVectorsFromSequenceFiles.run(SparseVectorsFromSequenceFiles.java:204)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
> at
> org.apache.mahout.vectorizer.SparseVectorsFromSequenceFiles.main(SparseVectorsFromSequenceFiles.java:55)
> 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)
> Caused by: java.lang.NoSuchMethodException:
> org.apache.lucene.analysis.standard.StandardAnalyzer.<init>()
> at java.lang.Class.getConstructor0(Class.java:2706)
> at java.lang.Class.getConstructor(Class.java:1657)
> at
> org.apache.mahout.common.ClassUtils.instantiateAs(ClassUtils.java:62)
> ... 11 more
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