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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2015/04/03 15:18:54 UTC
[jira] [Resolved] (LUCENE-6385) NullPointerException from
Highlighter.getBestFragment()
[ https://issues.apache.org/jira/browse/LUCENE-6385?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Muir resolved LUCENE-6385.
---------------------------------
Resolution: Fixed
Fix Version/s: 5.2
Trunk
Thanks again Terry
> NullPointerException from Highlighter.getBestFragment()
> -------------------------------------------------------
>
> Key: LUCENE-6385
> URL: https://issues.apache.org/jira/browse/LUCENE-6385
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/highlighter
> Affects Versions: 5.2
> Reporter: Terry Smith
> Assignee: Robert Muir
> Fix For: Trunk, 5.2
>
> Attachments: LUCENE-6385.patch
>
>
> When testing against the 5.1 nightly snapshots I've come across a NullPointerException in highlighting when nothing would be highlighted. This does not happen with 5.0.
> {noformat}
> java.lang.NullPointerException
> at __randomizedtesting.SeedInfo.seed([3EDC6EB0FA552B34:9971866E394F5FD0]:0)
> at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extractWeightedSpanTerms(WeightedSpanTermExtractor.java:311)
> at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extract(WeightedSpanTermExtractor.java:151)
> at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.getWeightedSpanTerms(WeightedSpanTermExtractor.java:515)
> at org.apache.lucene.search.highlight.QueryScorer.initExtractor(QueryScorer.java:219)
> at org.apache.lucene.search.highlight.QueryScorer.init(QueryScorer.java:187)
> at org.apache.lucene.search.highlight.Highlighter.getBestTextFragments(Highlighter.java:196)
> at org.apache.lucene.search.highlight.Highlighter.getBestFragments(Highlighter.java:156)
> at org.apache.lucene.search.highlight.Highlighter.getBestFragment(Highlighter.java:102)
> at org.apache.lucene.search.highlight.Highlighter.getBestFragment(Highlighter.java:80)
> at org.apache.lucene.search.highlight.MissesTest.testPhraseQuery(MissesTest.java:50)
> {noformat}
> I've written a small unit test and used git bisect to narrow the regression to the following commit:
> {noformat}
> commit 24e4eefaefb1837d1d4fa35f7669c2b264f872ac
> Author: Michael McCandless <mi...@apache.org>
> Date: Tue Mar 31 08:48:28 2015 +0000
> LUCENE-6308: cutover Spans to DISI, reuse ConjunctionDISI, use two-phased iteration
>
> git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_5x@1670273 13f79535-47bb-0310-9956-ffa450edef68
> {noformat}
> The problem looks quite simple, WeightedSpanTermExtractor.extractWeightedSpanTerms() needs an early return if SpanQuery.getSpans() returns null. All other callers check against this.
> Unit test and fix (against the regressed commit) attached.
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