I should add further that the only reason I went with a thread for the index
changes (add/delete/update) is so that I could control the frequency of
index optimization to keep things running smoothly - I didn't want every
minor change to result in a blocking optimization call. Other than that, I
can instantiate multiple copies of my server application and they all
coexist quite cheerfully using the standard Lucene.Net.lockdir parameter.
On 1/18/07, Ben Martz <[EMAIL PROTECTED]> wrote:
Out of curiosity, are you running into the multiple writer issue when you
correctly set up the lock directory? I use the following code in my
application prior to creating an index writer.
private static bool m_LockInitted = false;
public static void InitLockDir()
{
if (m_LockInitted)
return;
string lockPath = Common.GetIndexPath() + @"\lock";
if (!Directory.Exists(lockPath))
Directory.CreateDirectory(lockPath);
ConfigurationManager.AppSettings["Lucene.Net.lockdir"] =
lockPath; // <-- this is the important part
m_LockInitted = true;
}
On 1/18/07, Torsten Rendelmann <[EMAIL PROTECTED]> wrote:
>
> AFAIK only index modifications require a lock, while a concurrent
> search does not. We run into the same problem (concurrent index
> writers) and "solved" it using a single index mod. thread working
> with a queue of documents to add/delete/update.
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> > Sent: Monday, January 15, 2007 7:25 PM
> > To: lucene-net-user@incubator.apache.org
> > Subject: RE: FileNotFoundException, is this code supposed to work?
> >
> >
> > I receive these kinds of errors when multiple threads are
> > searching/writing
> > to the index at the same time. So far, I have had to resort
> > to .NET locks
> > for key locations in code, such as:
> >
> > Dim hits As Hits = Nothing
> > SyncLock aLock
> > hits = searcher.Search(query, df1, custSort)
> > End SyncLock
> >
> > SyncLock aLock
> > Result = reader.DeleteDocuments(New Term("Id",
> > CStr(Id)))
> > reader.Close()
> > End SyncLock
> >
> > SyncLock aLock
> > writer.AddDocument(doc)
> > writer.Close()
> > End SyncLock
> >
> >
> > This of course kills our scalability, so I am so interested
> > in knowing how
> > to address multi-process/multi-threaded access to any
> > particular index.
> >
> >
> >
> > - Michael
> >
> >
> >
> > -----Original Message-----
> > From: Simon Gartz [mailto:[EMAIL PROTECTED]
> > Sent: Monday, January 15, 2007 6:54 AM
> > To: lucene-net-user@incubator.apache.org
> > Subject: FileNotFoundException, is this code supposed to work?
> >
> > Hi,
> >
> > I've seen this questions before with slightly different
> > approaches, but non
> > with sample code. Is this code supposed to work or not, using
> > Lucene.net
> > v1.9.1.3?
> > I get follwing error executing the code below. Note that it
> > might take some
> > time to crash.
> >
> > System.IO.FileNotFoundException : Could not find file
> > "C:\DOCUME~1\sgartz\LOCALS~1\Temp\lucene\_1ji.frq".
> > at System.IO.__Error.WinIOError(Int32 errorCode, String str)
> > at System.IO.FileStream..ctor(String path, FileMode
> > mode, FileAccess
> > access, FileShare share, Int32 bufferSize, Boolean useAsync,
> > String msgPath,
> > Boolean bFromProxy)
> > at System.IO.FileStream..ctor(String path, FileMode
> > mode, FileAccess
> > access, FileShare share)
> > at Lucene.Net.Store.Descriptor..ctor(FSIndexInput
> > enclosingInstance, FileInfo file, FileAccess mode)
> > at Lucene.Net.Store.FSIndexInput..ctor(FileInfo path)
> > at Lucene.Net.Store.FSDirectory.OpenInput(String name)
> > at Lucene.Net.Index.SegmentReader.Initialize(SegmentInfo si)
> > at Lucene.Net.Index.SegmentReader.Get(Directory dir,
> > SegmentInfo si,
> > SegmentInfos sis, Boolean closeDir, Boolean ownDir)
> > at Lucene.Net.Index.SegmentReader.Get(SegmentInfo si)
> > at Lucene.Net.Index.AnonymousClassWith.DoBody ()
> > at Lucene.Net.Store.With.Run()
> > at Lucene.Net.Index.IndexReader.Open(Directory
> > directory, Boolean
> > closeDirectory)
> > at Lucene.Net.Index.IndexReader.Open(String path)
> > at Lucene.Net.Search.IndexSearcher..ctor(String path)
> >
> > c:\projects\x\development\x.test\indexingservice\indexingservi
> > cetest.cs(
> > 128,0): at
> > x.Test.IndexingService.IndexingServiceTest.LuceneThreadTest ()
> >
> >
> > private static readonly string directory =
> > Path.Combine(Path.GetTempPath(), "lucene");
> >
> > [Test]
> > public void LuceneThreadTest(){
> >
> > //Create index
> > Lucene.Net.Analysis.Analyzer analyzer = new
> > Lucene.Net.Analysis.SimpleAnalyzer();
> > Lucene.Net.Index.IndexWriter writer = new
> > Lucene.Net.Index.IndexWriter(directory, analyzer, true);
> > writer.Close();
> >
> > //Start indexing thread
> > Thread indexThread = new Thread(new
> > ThreadStart(LuceneIndexThread));
> > indexThread.Start();
> >
> > while(indexThread.IsAlive ){
> > Console.WriteLine("Searching...");
> >
> > Lucene.Net.Search.Searcher searcher = new
> > Lucene.Net.Search.IndexSearcher(directory);
> >
> > Lucene.Net.Search.Hits hits = null;
> > Lucene.Net.QueryParsers.QueryParser parser = new
> > Lucene.Net.QueryParsers.QueryParser("contents", analyzer);
> > Lucene.Net.Search.Query query = parser.Parse("put");
> > Console.WriteLine("Query: " + query.ToString("contents"));
> >
> > hits = searcher.Search(query);
> > Console.WriteLine(hits.Length() + " total results");
> > for (int i = 0; i < hits.Length() && i < 10; i++) {
> > Lucene.Net.Documents.Document d = hits.Doc(i);
> > Console.WriteLine(i + " " + hits.Score(i) + " " +
> > d.Get("contents").Length + " " + d.Get("contents").Substring(0, 20));
> > }
> > searcher.Close();
> > Thread.Sleep(1000);
> > }
> > }
> > private void LuceneIndexThread(){
> > Console.WriteLine("Start indexing files");
> > for(int j = 0; j < 100; j++){
> >
> > Lucene.Net.Analysis.Analyzer analyzer = new
> > Lucene.Net.Analysis.SimpleAnalyzer();
> > Lucene.Net.Index.IndexWriter writer = new
> > Lucene.Net.Index.IndexWriter (directory, analyzer, false);
> >
> > for (int i = 0; i < 100; i++) {
> > Lucene.Net.Documents.Document d = new
> > Lucene.Net.Documents.Document();
> > string content = new string('a', (new Random()).Next(100) * 10);
> > d.Add(new Lucene.Net.Documents.Field("contents", "Put
> > contents here " +
> > content, Lucene.Net.Documents.Field.Store.YES,
> > Lucene.Net.Documents.Field.Index.TOKENIZED));
> > writer.AddDocument(d);
> > }
> > writer.Close();
> > Console.WriteLine("Indexed 100 documents...");
> > }
> > Console.WriteLine("Finished indexing files");
> > }
> >
> >
> > Regards
> > Simon
> >
>
>
>
--
Mmmmmm...C8H11NO2
--
Mmmmmm...C8H11NO2
