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From "Patrick Jungermann (JIRA)" <>
Subject [jira] Created: (LUCENE-1939) IndexOutOfBoundsException at ShingleMatrixFilter's Iterator#hasNext method
Date Fri, 02 Oct 2009 10:49:23 GMT
IndexOutOfBoundsException at ShingleMatrixFilter's Iterator#hasNext method

                 Key: LUCENE-1939
             Project: Lucene - Java
          Issue Type: Bug
          Components: contrib/analyzers
    Affects Versions: 2.9
            Reporter: Patrick Jungermann
         Attachments: ShingleMatrixFilter_IndexOutOfBoundsException.patch

I tried to use the ShingleMatrixFilter within Solr. To test the functionality etc., I first
used the built-in field analysis view.The filter was configured to be used only at query time
analysis with "_" as spacer character and a min. and max. shingle size of 2. The generation
of the shingles for query strings with this filter seems to work at this view, but by turn
on the highlighting of indexed terms that will match the query terms, the exception was thrown.
Also, each time I tried to query the index the exception was immediately thrown.

java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
	at java.util.ArrayList.RangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at org.apache.lucene.analysis.shingle.ShingleMatrixFilter$Matrix$1.hasNext(

Within the hasNext method, there is the {{s-1}}-th Column from the ArrayList {{columns}} requested,
but there isn't this entry within columns.

I created a patch that checks, if {{columns}} contains enough entries.

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