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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-4873) corner case in MinShouldMatchSumScorer when there are many terms
Date Sat, 23 Mar 2013 03:15:15 GMT
Robert Muir created LUCENE-4873:
-----------------------------------

             Summary: corner case in MinShouldMatchSumScorer when there are many terms
                 Key: LUCENE-4873
                 URL: https://issues.apache.org/jira/browse/LUCENE-4873
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/query/scoring
    Affects Versions: 4.3
            Reporter: Robert Muir


I think this bug is some extreme corner case...

This test currently only uses up to 9 terms. By increasing it to 26 and blasting the test,
I was able to uncover a bug.

Here's the seed: ant test  -Dtestcase=TestMinShouldMatch2 -Dtests.method=testNextAllTerms
-Dtests.seed=E0334C37E6E190D8 -Dtests.slow=true -Dtests.locale=pl_PL -Dtests.timezone=Asia/Thimphu
-Dtests.file.encoding=US-ASCII

Here's the patch to make the test use 26 terms.
{noformat}
Index: lucene/core/src/test/org/apache/lucene/search/TestMinShouldMatch2.java
===================================================================
--- lucene/core/src/test/org/apache/lucene/search/TestMinShouldMatch2.java	(revision 1459937)
+++ lucene/core/src/test/org/apache/lucene/search/TestMinShouldMatch2.java	(working copy)
@@ -56,7 +56,7 @@
   static final String alwaysTerms[] = { "a" };
   static final String commonTerms[] = { "b", "c", "d" };
   static final String mediumTerms[] = { "e", "f", "g" };
-  static final String rareTerms[]   = { "h", "i", "j" };
+  static final String rareTerms[]   = { "h", "i", "j", "k", "l", "m", "n", "o", "p", "q",
"r", "s", "t", "u", "v", "w", "x", "y", "z" };
   
   @Override
   public void setUp() throws Exception {
{noformat}


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