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https://issues.apache.org/jira/browse/LUCENE-6983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15108200#comment-15108200
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Dawid Weiss commented on LUCENE-6983:
-------------------------------------
Please see more documentation. IndexSearcher does it for you, it collects only
non-deleted documents. You can also do it yourself if you implement a custom
collector, but I'd use the simpler methods that collect top-n matches for you.
> IndexWriter.updateDocument on FSDirectory does not work Ver.5.4.0
> -----------------------------------------------------------------
>
> Key: LUCENE-6983
> URL: https://issues.apache.org/jira/browse/LUCENE-6983
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 5.4
> Environment: Windows 8, Java 1.8.0_60
> Reporter: uygar yuzsuren
>
> I try to create a simple index and then update documents (with
> IndexWriter.updateDocuments). When I use RAMDirectory it works fine
> (IndexWriter.numDocs returns correct value, IndexSearcher.search returns
> correct hits). However, when I use FSDirectory it creates duplicate
> documents, and IndexSearcher returns multiple documents with same key field
> values. Here is the code excerpt:
> //This code is in a thread and it updates documents with regular intervals,
> say 1 min.
> Analyzer analyzer = new StandardAnalyzer();
> try {
> Path path = Paths.get(indexDirectory);
> Directory directory = FSDirectory.open(path);
> IndexWriterConfig config = new IndexWriterConfig(analyzer);
> IndexWriter iwriter = new IndexWriter(directory, config);
> System.out.println("Document count=" + iwriter.numDocs());
> for (Company newCompany : newCompanies)
> { Document doc = new Document(); doc.add(new Field("entityid", "Company" +
> newCompany.getId().toString(), TextField.TYPE_STORED)); doc.add(new
> Field("companyname", newCompany.getName(), TextField.TYPE_NOT_STORED)); Term
> term = new Term("entityid", "Company" + newCompany.getId().toString());
> iwriter.updateDocument(term, doc); }
> iwriter.flush();
> iwriter.commit();
> System.out.println("Document count2=" + iwriter.numDocs());
> iwriter.close();
> } catch (IOException e1)
> { e1.printStackTrace(); }
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