Anyway, the writeLock is used to avoid 2 different writers (or reader if you use 'delete') to modify the same index.
What do you mean by first file ??
Franck
jitender ahuja wrote:
Hi,
Ok, but what is the use of the writeLock, as the directory is modified anyway! As if the writeLock is an issue then then the index directory should have index information only for the first file.
Thanks, Jitender
----- Original Message ----- From: "Brisbart Franck" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; "Lucene Users List"
<[EMAIL PROTECTED]>
Sent: Tuesday, April 13, 2004 10:15 PM
Subject: Re: Closing IndexWriter object after each file causes
NullPointerException?
If you close an IndexWriter more than once, the release of the writeLock creates a NullPointerException. You should clean your code and close your writer only once. Anyway, I don't know why there's no test on the 'writeLock' as in the 'finalize' method. I think it's a little error, so I suggest the attached patch to fix that.
Franck Brisbart
jitender ahuja wrote:
Hi, Can anyone tell what is the cause of error for the following error as the source of error is not any of the following: a) Index directory closing after each file of the directory (to be indexed) : verified by the changing directory size, with the changing number of files to be indexed b) IndexWriter object being closed out : verified by checking the IndexWriter object ( here, writ) being a non-null object, by the line: System.out.println(writ != null); in the attached code
Error output: java.lang.NullPointerException at org.apache.lucene.index.IndexWriter.close(Unknown Source) at IndexDatanew.indexDocs(IndexDatanew.java:89) at IndexDatanew.indexDocs(IndexDatanew.java:50) at IndexDatanew.main(IndexDatanew.java:25)
The code that causes this error is working fine otherwise (i.e. for indexing purposes) and is "attached"; the output in detail for a directory of 2 files is also attached.:
Thanks Jitender
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C:\lucroche>java IndexDatanew E:\freebooks\books\whole\jiten Index Directory: E:\freebooks\books\whole\jiten 2 E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm adding: E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm File contents from buffer: E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm false E:\freebooks\books\whole\jiten\TIJ3_c.htm adding: E:\freebooks\books\whole\jiten\TIJ3_c.htm File contents from buffer: E:\freebooks\books\whole\jiten\TIJ3_c.htm false java.lang.NullPointerException at org.apache.lucene.index.IndexWriter.close(Unknown Source) at IndexDatanew.indexDocs(IndexDatanew.java:89) at IndexDatanew.indexDocs(IndexDatanew.java:50) at IndexDatanew.main(IndexDatanew.java:25)
------------------------------------------------------------------------
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---------------------------------------------------------------------------- ----
Index: IndexWriter.java =================================================================== RCS file:
/home/cvspublic/jakarta-lucene/src/java/org/apache/lucene/index/IndexWriter. java,v
retrieving revision 1.28 diff -u -r1.28 IndexWriter.java --- IndexWriter.java 25 Mar 2004 19:34:53 -0000 1.28 +++ IndexWriter.java 13 Apr 2004 16:39:56 -0000 @@ -235,8 +235,10 @@ public synchronized void close() throws IOException { flushRamSegments(); ramDirectory.close(); - writeLock.release(); // release write lock - writeLock = null; + if (writeLock != null) { + writeLock.release(); // release write lock + writeLock = null; + } directory.close(); }
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-- Franck Brisbart R&D http://www.kelkoo.com
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