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  1. Lucene - Core
  2. LUCENE-337

Combination of BooleanQuery and PhrasePrefixQuery can provoke UnsupportedOperationException

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 1.4
    • None
    • core/search
    • None
    • Operating System: Mac OS X 10.3
      Platform: All

    • 33161

    Description

      A BooleanQuery including a PhrasePrefixQuery can cause an exception to be thrown
      from BooleanScorer#skipTo when the search is executed:

      java.lang.UnsupportedOperationException
      at org.apache.lucene.search.BooleanScorer.skipTo(BooleanScorer.java:189)
      at org.apache.lucene.search.ConjunctionScorer.doNext(ConjunctionScorer.java:53)
      at org.apache.lucene.search.ConjunctionScorer.next(ConjunctionScorer.java:48)
      at org.apache.lucene.search.Scorer.score(Scorer.java:37)
      at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:92)
      at org.apache.lucene.search.Hits.getMoreDocs(Hits.java:64)
      at org.apache.lucene.search.Hits.<init>(Hits.java:43)
      at org.apache.lucene.search.Searcher.search(Searcher.java:33)
      at org.apache.lucene.search.Searcher.search(Searcher.java:27)
      ... (non-lucene code)

      The problem appears to be that PhrasePrefixQuery optimizes itself into a
      BooleanQuery when it contains only one term. However, it does this in the
      createWeight() method of its scorer instead of in the rewrite method of the
      query itself. Thus it bypasses the boolean typecheck when BooleanQuery is
      deciding whether to use ConjunctionScorer or BooleanScorer, eventually resulting
      in the UOE.

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            java-dev@lucene.apache.org Lucene Developers
            rhett@detailedbalance.net Rhett Sutphin
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            Dates

              Created:
              Updated:
              Resolved: