1- Getting the exception "....which is being used by another process." is a lucene bug, but getting "Lock obtain timeout" is an expected behaviour. Two processes/threads can not access the same index for writing at the same time.
2- To set the timeout value --> Lucene.Net.Index.IndexWriter.SetDefaultWriteLockTimeout(1000*60); (you can't use the instance of IndexWriter since it times out at the constructor). DIGY -----Original Message----- From: Eran Sevi [mailto:[EMAIL PROTECTED] Sent: Thursday, March 20, 2008 4:06 PM To: lucene-net-user@incubator.apache.org Subject: RE: Multi process writer access to an index I moved to 2.1 although it's not declared as "final". Still, I get the following exception: Lock obtain timed out: [EMAIL PROTECTED]:\Temp\xml\Lucene\MTIndex\write.lock at Lucene.Net.Store.Lock.Obtain(Int64 lockWaitTimeout) in D:\C#\src\Lucene.Net\Store\Lock.cs:line 85 at Lucene.Net.Index.IndexWriter.Init(Directory d, Analyzer a, Boolean create, Boolean closeDir) in D:\C#\src\Lucene.Net\Index\IndexWriter.cs:line 437 at Lucene.Net.Index.IndexWriter.Init(FileInfo path, Analyzer a, Boolean create) in D:\C#\src\Lucene.Net\Index\IndexWriter.cs:line 421 at Lucene.Net.Index.IndexWriter..ctor(FileInfo path, Analyzer a, Boolean create) in D:\C#\src\Lucene.Net\Index\IndexWriter.cs:line 297 at Nice.Analytics.Lucene.AAIndexer.RunThread(Object data) in D:\LuceneWrapper\Indexer.cs:line 158 at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart(Object obj) I run 2 threads which doesn't share any object between them. Both succeed at creating an instance of a new IndexWriter on the same folder but fail when trying to Close the index. I tried setting the lockWaitTimeout to 300000 but the exception is thrown immediately. -----Original Message----- From: Digy [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 19, 2008 18:37 PM To: lucene-net-user@incubator.apache.org Subject: RE: Multi process writer access to an index Which version do you use?.This bug exists in version 2.0. You can get the latest version 2.1 from svn. DIGY. -----Original Message----- From: Eran Sevi [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 19, 2008 12:17 PM To: lucene-net-user@incubator.apache.org Subject: Multi process writer access to an index Hi, Using the latest Lucene.Net release I encounter exceptions when trying to write to the same index from different processes/threads. The errors are about accessing the deletable file which is being used by another process. I don't perform any specific locking because as I understand it there should be file-specific locking mechanism used by lucene API. This doesn't seem to be working as I am able to instantiate an IndexWriter on the same index simultaneously, but I encounter problems when I try to close/optimize it . Here's an example of what I do in each process/thread: writer = new IndexWriter(fi, new StandardAnalyzer(threadData.stopwords), true); while (currentFile < threadData.files.Length) { //Add document AddDocument(threadData.files[currentFile], writer); writer.Close(); currentFile++; } Please help me understand if lucene doesn't support this kind of access, and what's the proper way to write to the same index from two or more different processes/computers. Thanks, Eran S.
