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From yahootintin.1247...@bloglines.com
Subject Windows Bug?
Date Mon, 08 Nov 2004 18:27:12 GMT
Hi,

My understanding is that I can have an IndexReader open for searching
(as long as it doesn't delete) while an IndexWriter is updating the index.
 

I wrote a simple test app to prove this and it works great on Mac OS
X, Java 1.4.2 and Lucene 1.4.2.  It fails on Windows XP, Java 1.4.2 and Lucene
1.4.2.  I tried other versions of Lucene and it failed in those too.

This
is the app that fails on Windows:

public static void main(String[] args)

throws Exception {
  String indexFolder = "/TestIndex";
     
  // add
a document to the index
  IndexWriter indexWriter = new IndexWriter
   
(indexFolder, 
     new StandardAnalyzer(), true);
  Document document =
new Document();
  Field field = new Field("foo", "bar", 
              
           true, true, true)
  document.add(field);
  indexWriter.addDocument(document);

  indexWriter.close();

  // open an index reader but don't close it

 IndexReader indexReader =
    IndexReader.open(indexFolder);

  // open
an index writer
  indexWriter = new IndexWriter
    (indexFolder, 
   
 new StandardAnalyzer(), true);
  indexWriter.close();
}

On Windows XP
this throws an Exception as soon as it tries to open the IndexWriter after
the IndexReader has been opened.

Here's the stack trace:
Exception in
thread "main" java.io.IOException: Cannot delete _1.cfs
  at org.apache.lucene.store.FSDirectory.create(FSDirectory.java:144)

  at org.apache.lucene.store.FSDirectory.getDirectory(FSDirectory.java:105)

  at org.apache.lucene.store.FSDirectory.getDirectory(FSDirectory.java:83)

  at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:173)
 
at scratch.TestLuceneLocks.main(TestLuceneLocks.java:17)

Is this a bug?


Thanks.

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