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POLucene 3.0.3 does not delete document
 

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    <p>We use Lucene to index some internal documents. Sometimes we need to remove documents. These documents have an unique id and are represented by a class DocItem as follows (ALL THE CODE IS A SIMPLIFIED VERSION WITH ONLY SIGNIFICANT (I hope) PARTS):</p> <pre><code>public final class DocItem { public static final String fID = "id"; public static final String fTITLE = "title"; private Document doc = new Document(); private Field id = new Field(fID, "", Field.Store.YES, Field.Index.ANALYZED); private Field title = new Field(fTITLE, "", Field.Store.YES, Field.Index.ANALYZED); public DocItem() { doc.add(id); doc.add(title); } ... getters &amp; setters public getDoc() { return doc; } } </code></pre> <p>So, to index a document, a new DocItem is created and passed to an indexer class as follows:</p> <pre><code>public static void index(DocItem docitem) { File file = new File("indexdir"); Directory dir= new SimpleFSDirectory(file); IndexWriter idxWriter = new IndexWriter(dir, new StandardAnalyzer(Version.LUCENE_30), IndexWriter.MaxFieldLength.UNLIMITED); idxWriter.addDocument(docitem.getDoc()); idxWriter.close(); } </code></pre> <p>We created an auxiliary method to iterate over the index directory:</p> <pre><code>public static void listAll() { File file = new File("indexdir"); Directory dir = new SimpleFSDirectory(file); IndexReader reader = IndexReader.open(dir); for (int i = 0; i &lt; reader.maxDoc(); i++) { Document doc = reader.document(i); System.out.println(doc.get(DocItem.fID)); } } </code></pre> <p>Running the listAll, we can see that our docs are being indexed properly. At least, we can see the id and other attributes.</p> <p>We retrieve the document using IndexSearcher as follows:</p> <pre><code>public static DocItem search(String id) { File file = new File("indexdir"); Directory dir = new SimpleFSDirectory(file); IndexSearcher searcher = new IndexSearcher(index, true); Query q = new QueryParser(Version.LUCENE_30, DocItem.fID, new StandardAnalyzer(Version.LUCENE_30)).parse(id); TopDocs td = searcher.search(q, 1); ScoreDoc[] hits = td.scoreDocs; searcher.close(); return hits[0]; } </code></pre> <p>So after retrieving it, we are trying to delete it with:</p> <pre><code>public static void Delete(DocItem docitem) { File file = new File("indexdir"); Directory dir= new SimpleFSDirectory(file); IndexWriter idxWriter = new IndexWriter(dir, new StandardAnalyzer(Version.LUCENE_30), IndexWriter.MaxFieldLength.UNLIMITED); idxWriter.deleteDocuments(new Term(DocItem.fID, docitem.getId())); idxWriter.commit(); idxWriter.close(); } </code></pre> <p>The problem is that it doesn't work. The document is never deleted. If I run the listAll() after the deletion, the document is still there. We tried to use IndexReader, with no lucky.</p> <p>By this <a href="https://stackoverflow.com/questions/3728901/lucene-delete-record-depreciated">post</a> and this <a href="https://stackoverflow.com/questions/3710941/deleting-document-by-term-from-lucene">post</a>, We think that we are using it accordinlgy.</p> <p>What we are doing wrong? Any advice? We are using lucene 3.0.3 and java 1.6.0_24.</p> <p>TIA,</p> <p>Bob</p>
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