Miguel Ferreira created LUCENE-4669:
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Summary: Document wrongly deleted from index
Key: LUCENE-4669
URL: https://issues.apache.org/jira/browse/LUCENE-4669
Project: Lucene - Core
Issue Type: Bug
Components: core/index
Affects Versions: 4.0
Environment: OS = Mac OS X 10.7.5
Java = JVM 1.6
Reporter: Miguel Ferreira
I'm trying to implement document deletion from an index.
If I create an index with three documents (A, B and C) and then try to delete
A, A gets marked as deleted but C is removed from the index. I've tried this
with different number of documents and saw that it is always the last document
that is removed.
Example unit test:
{code:title=ExampleUnitTest.java}
@Test
public void delete() throws Exception {
File indexDir = FileUtils.createTempDir();
IndexWriter writer = new IndexWriter(new NIOFSDirectory(indexDir), new
IndexWriterConfig(Version.LUCENE_40,
new StandardAnalyzer(Version.LUCENE_40)));
Document doc = new Document();
String fieldName = "path";
doc.add(new StringField(fieldName, "a", Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(new StringField(fieldName, "b", Store.YES));
writer.addDocument(doc);
doc = new Document();
doc.add(new StringField(fieldName, "c", Store.YES));
writer.addDocument(doc);
writer.commit();
System.out.println("Before delete");
print(indexDir);
writer.deleteDocuments(new Term(fieldName, "a"));
writer.commit();
System.out.println("After delete");
print(indexDir);
}
public static void print(File indexDirectory) throws IOException {
DirectoryReader reader = DirectoryReader.open(new
NIOFSDirectory(indexDirectory));
Bits liveDocs = MultiFields.getLiveDocs(reader);
int numDocs = reader.numDocs();
System.out.println("Found " + numDocs + " documents");
for (int i = 0; i < numDocs; i++) {
Document document = reader.document(i);
StringBuffer sb = new StringBuffer();
sb.append("Document at = ").append(i);
sb.append("; isDeleted = ").append(liveDocs != null ?
!liveDocs.get(i) : false).append("; ");
for (IndexableField field : document.getFields()) {
String fieldName = field.name();
for (String value : document.getValues(fieldName)) {
sb.append(fieldName).append(" = ").append(value).append(";
");
}
}
System.out.println(sb.toString());
}
}
{code}
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