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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2014) position increment bug: smartcn
Date Thu, 29 Oct 2009 08:04:59 GMT
position increment bug: smartcn
-------------------------------

                 Key: LUCENE-2014
                 URL: https://issues.apache.org/jira/browse/LUCENE-2014
             Project: Lucene - Java
          Issue Type: Bug
          Components: contrib/analyzers
            Reporter: Robert Muir
         Attachments: LUCENE-2014.patch

If i use LUCENE_VERSION >= 2.9 with smart chinese analyzer, it will crash indexwriter with
any reasonable amount of chinese text.

its especially annoying because it happens in 2.9.1 RC as well.

this is because the position increments for tokens after stopwords are bogus:

Here's an example (from test case), where the position increment should be 2, but is instead
91975314!

{code}
  public void testChineseStopWords2() throws Exception {
    Analyzer ca = new SmartChineseAnalyzer(Version.LUCENE_CURRENT); /* will load stopwords
*/
    String sentence = "Title:San"; // : is a stopword
    String result[] = { "titl", "san"};
    int startOffsets[] = { 0, 6 };
    int endOffsets[] = { 5, 9 };
    int posIncr[] = { 1, 2 };
    assertAnalyzesTo(ca, sentence, result, startOffsets, endOffsets, posIncr);
  }
{code}

junit.framework.AssertionFailedError: posIncrement 1 expected:<2> but was:<91975314>
	at junit.framework.Assert.fail(Assert.java:47)
	at junit.framework.Assert.failNotEquals(Assert.java:280)
	at junit.framework.Assert.assertEquals(Assert.java:64)
	at junit.framework.Assert.assertEquals(Assert.java:198)
	at org.apache.lucene.analysis.BaseTokenStreamTestCase.assertTokenStreamContents(BaseTokenStreamTestCase.java:83)
	...






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