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  1. Lucene - Core
  2. LUCENE-1140

NPE in StopFilter caused by StandardAnalyzer(boolean replaceInvalidAcronym) constructor

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Details

    • Bug
    • Status: Closed
    • Blocker
    • Resolution: Fixed
    • 2.3
    • 2.3
    • modules/analysis
    • None

    Description

      I think that I found a problem with the new code (https://issues.apache.org/jira/browse/LUCENE-1068).
      Usage of the new constructor StandardAnalyzer(boolean replaceInvalidAcronym) causes NPE in
      StopFilter:

      java.lang.NullPointerException
      at org.apache.lucene.analysis.StopFilter.<init>(StopFilter.java:74)
      at org.apache.lucene.analysis.StopFilter.<init>(StopFilter.java:86)
      at
      org.apache.lucene.analysis.standard.StandardAnalyzer.tokenStream(StandardAnalyzer.java:151)
      at
      org.apache.lucene.queryParser.QueryParser.getFieldQuery(QueryParser.java:452)
      at
      org.apache.lucene.queryParser.QueryParser.Term(QueryParser.java:1133)
      at
      org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:1020)
      at
      org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:948)
      at
      org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:1024)
      at
      org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:948)
      at
      org.apache.lucene.queryParser.QueryParser.TopLevelQuery(QueryParser.java:937)
      at
      org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:147)

      The reason is that new constructor forgets to initialize the stopSet field:
      public StandardAnalyzer(boolean replaceInvalidAcronym)

      { this.replaceInvalidAcronym = replaceInvalidAcronym; }

      I guess this should be changed to something like this:
      public StandardAnalyzer(boolean replaceInvalidAcronym)

      { this(STOP_WORDS); this.replaceInvalidAcronym = replaceInvalidAcronym; }

      The bug is present in RC3. Fix is one line, it'll be great to have it in 2.3
      release.

      Attachments

        1. LUCENE-1140.patch
          3 kB
          Grant Ingersoll

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              gsingers Grant Ingersoll
              dets Alexei Dets
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              Dates

                Created:
                Updated:
                Resolved: