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Date: Tue, 8 Sep 2009 14:18:57 -0700 (PDT)
From: "Uwe Schindler (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Commented: (LUCENE-1903) Incorrect ShingleFilter behavior
 when outputUnigrams == false
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    [ https://issues.apache.org/jira/browse/LUCENE-1903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12752750#action_12752750 ] 

Uwe Schindler commented on LUCENE-1903:
---------------------------------------

Did the test pass with 2.4.1?

If yes, it's caused by the rewrite and could you please assign 2.9 as the affected version? I think Michael Busch did this TokenFilter, maybe he understands the shingle code.

> Incorrect ShingleFilter behavior when outputUnigrams == false
> -------------------------------------------------------------
>
>                 Key: LUCENE-1903
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1903
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: contrib/analyzers
>            Reporter: Chris Harris
>         Attachments: LUCENE-1903_testcases.patch, TEST-org.apache.lucene.analysis.shingle.ShingleFilterTest.xml
>
>
> ShingleFilter isn't working as expected when outputUnigrams == false. In particular, it is outputting unigrams at least some of the time when outputUnigrams==false.
> I'll attach a patch to ShingleFilterTest.java that adds some test cases that demonstrate the problem.
> I haven't checked this, but I hypothesize that the behavior for outputUnigrams == false got changed when the class was upgraded to the new TokenStream API?

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