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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2016/11/28 16:37:58 UTC
[jira] [Updated] (LUCENE-7576) RegExp automaton causes NPE on
Terms.intersect
[ https://issues.apache.org/jira/browse/LUCENE-7576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless updated LUCENE-7576:
---------------------------------------
Attachment: LUCENE-7576.patch
Patch w/ test (thank you!) and fix. This is unfortunately a confusing expert API; other terms dicts were checking that the provided compiled automaton is {{NORMAL}} and throwing a clearer exception if not, so I carried that same check over to the default terms dict. I also added a note to the javadocs for {{Terms.intersect}}.
> RegExp automaton causes NPE on Terms.intersect
> ----------------------------------------------
>
> Key: LUCENE-7576
> URL: https://issues.apache.org/jira/browse/LUCENE-7576
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/codecs, core/index
> Affects Versions: 6.2.1
> Environment: java version "1.8.0_77" macOS 10.12.1
> Reporter: Tom Mortimer
> Assignee: Michael McCandless
> Priority: Minor
> Attachments: LUCENE-7576.patch
>
>
> Calling org.apache.lucene.index.Terms.intersect(automaton, null) causes an NPE:
> String index_path = <path to index>
> String term = <a valid term name>
> Directory directory = FSDirectory.open(Paths.get(index_path));
> IndexReader reader = DirectoryReader.open(directory);
> Fields fields = MultiFields.getFields(reader);
> Terms terms = fields.terms(args[1]);
> CompiledAutomaton automaton = new CompiledAutomaton(
> new RegExp("do_not_match_anything").toAutomaton());
> TermsEnum te = terms.intersect(automaton, null);
> throws:
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.lucene.codecs.blocktree.IntersectTermsEnum.<init>(IntersectTermsEnum.java:127)
> at org.apache.lucene.codecs.blocktree.FieldReader.intersect(FieldReader.java:185)
> at org.apache.lucene.index.MultiTerms.intersect(MultiTerms.java:85)
> ...
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