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https://issues.apache.org/jira/browse/LUCENE-3180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045866#comment-13045866
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Danny Lade commented on LUCENE-3180:
------------------------------------
I tried to update some documents got by a query. The main problem ist, that not
all documents I found has to be updated (because the information to the changes
is calculated outside the index).
It looks like in the appended example:
{code:java}
for (ScoreDoc scoreDoc : hits) {
Document document = reader.document(scoreDoc.doc);
// calculate changes, if no changes, than ignore it
if (!hasChanged) {
continue;
}
// update document
// - remove / add fields
// - etc
// update at index
reader.deleteDocument(scoreDoc.doc);
writer.addDocument(document);
}
{code}
So how do I "update" (or "delete and add") a collection of documents without a
query or term given?
> 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(docID)" if
> using an IndexWriter too.
> using:
> {code:java}
> writer = new IndexWriter(directory, config);
> reader = IndexReader.open(writer, true);
> {code}
> results in:
> {code:java}
> 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)
> {code}
> and using:
> {code:java}
> writer = new IndexWriter(directory, config);
> reader = IndexReader.open(directory, false);
> {code}
>
> results in:
> {code:java}
> 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)
> {code}
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