It's impossible to tell from the code you provided, but you are most likely
just leaking memory/resources somewhere. For example, ResultSet's and other DB
operations should typically be placed in a try/catch/FINALLY block, where the
finally block ensures all DB resources are closed/released.
Otis
----- Original Message ----
From: Rahil <[EMAIL PROTECTED]>
To: Lucene User Group <java-user@lucene.apache.org>
Sent: Friday, May 19, 2006 8:27:55 AM
Subject: OutOfMemory and IOException Access Denied errors
Hi
I am new to Lucene so am perhaps missing something obvious. I have
included Lucene 1.9.1 in my classpath and am trying to integrate it with
MySQL.
I have a table which has near a million records in it. According to the
documentation on Lucene I have read so far, my understanding is that I
need to (1) make a connection with MySQL then (2) execute the query
normally in SQL syntax. (3) Then pass the ResultSet to the method to
create indexes. (4) I can then pass a queryString to the searchIndex()
custom method to locate the queryString.
PROBLEMS:
(a) The first problem I had was when trying to execute the query on the
million records table in Step 1. It resulted in an OutOfMemory error due
to the size of the table. How can I get around this problem so that the
query executes on the entire table at one time?
As a workaround, I limited the number of results to 100,000 which worked
fine.
(b) But I then received an IOException when the index was being written
to the Document object. The Exception stack trace is shown below:
---
Exception in thread "main" java.io.IOException: Access is denied
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:850)
at org.apache.lucene.store.FSDirectory$1.obtain(FSDirectory.java:324)
at org.apache.lucene.store.Lock.obtain(Lock.java:92)
at org.apache.lucene.store.Lock$With.run(Lock.java:147)
at org.apache.lucene.index.IndexWriter.mergeSegments(IndexWriter.java:442)
at
org.apache.lucene.index.IndexWriter.maybeMergeSegments(IndexWriter.java:401)
at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:260)
at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:244)
at man.ac.uk.most.LuceneIndex.indexResultSet(LuceneIndex.java:102) ---
error line in my piece of code !
at man.ac.uk.most.LuceneIndex.main(LuceneIndex.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
---
Line 102 is present in the block of code in my program as such
----
while(rs.next()){
lucDoc = new Document();
lucDoc.add(Field.Keyword("conceptId",rs.getString("CONCEPTID")));
lucDoc.add(Field.Text("term",rs.getString("TERM")));
lucDoc.add(Field.UnIndexed("descriptionType",rs.getString("DESCRIPTIONTYPE")));
indexWriter.addDocument(lucDoc); --- problem line 102
}
rs.close();
closeIndexWriter();
----
If I limit Step 1 to execute 10000 records then the program runs fine
and theres no problem. However I need to index the entire table either
as a single query or an incremental query.
Can someone please help me with these problems.
Thanks
Rahil
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
