Can't delete a document using deleteDocument(int docID) if using IndexWriter
AND IndexReader
--------------------------------------------------------------------------------------------
Key: LUCENE-3180
URL: https://issues.apache.org/jira/browse/LUCENE-3180
Project: Lucene - Java
Issue Type: Bug
Components: core/index
Affects Versions: 3.2
Environment: Windows
Reporter: Danny Lade
It is impossible to delete a document with
"reader.deleteDocument(scoreDoc.doc)" yet.
using:
Directory directory = FSDirectory.open(new File("lucene"));
writer = new IndexWriter(directory, config);
reader = IndexReader.open(writer, true);
results in:
Exception in thread "main" java.lang.UnsupportedOperationException: This
IndexReader cannot make any changes to the index (it was opened with readOnly =
true)
at
org.apache.lucene.index.ReadOnlySegmentReader.noWrite(ReadOnlySegmentReader.java:23)
at
org.apache.lucene.index.ReadOnlyDirectoryReader.acquireWriteLock(ReadOnlyDirectoryReader.java:43)
at
org.apache.lucene.index.IndexReader.deleteDocument(IndexReader.java:1067)
at
de.morpheum.morphy.ImpossibleLuceneCode.main(ImpossibleLuceneCode.java:60)
and using:
Directory directory = FSDirectory.open(new File("lucene"));
writer = new IndexWriter(directory, config);
reader = IndexReader.open(directory, false);
results in:
org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out:
NativeFSLock@S:\Java\Morpheum\lucene\write.lock
at org.apache.lucene.store.Lock.obtain(Lock.java:84)
at
org.apache.lucene.index.DirectoryReader.acquireWriteLock(DirectoryReader.java:765)
at
org.apache.lucene.index.IndexReader.deleteDocument(IndexReader.java:1067)
at
de.morpheum.morphy.ImpossibleLuceneCode.main(ImpossibleLuceneCode.java:69)
A workaround is:
for (ScoreDoc scoreDoc : hits) {
Document document = reader.document(scoreDoc.doc);
writer.addDocument(document);
}
writer.deleteDocuments(query);
But this is using the query twice and may result in inconsistent data (new
added documents may be removed also).
On the other hand I can't use the "writer.deleteDocuments(query)" first because
I need the documents for some updates.
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