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Posted to dev@lucene.apache.org by "Danny Lade (JIRA)" <ji...@apache.org> on 2011/06/08 09:06:58 UTC
[jira] [Updated] (LUCENE-3180) Can't delete a document using
deleteDocument(int docID) if using IndexWriter AND IndexReader
[ https://issues.apache.org/jira/browse/LUCENE-3180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Danny Lade updated LUCENE-3180:
-------------------------------
Attachment: ImpossibleLuceneCode.java
example code
> 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
> Attachments: ImpossibleLuceneCode.java
>
>
> 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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