Cannot find file _ov0.fnm

Hi Nicolas,
I think this is the bug in SimpleFSLockFactory in Lucene.Net 2.0.0
See https://issues.apache.org/jira/browse/LUCENENET-74
It is better to upgrade to 2.1
I don't know if there is a tool to recover the index, but i can propose a
solution
1-After backup, Open the segments???????? file in binary mode (~250 byte)
2-Decrement the file# counter(it is at offset 16[4 bytes])
3-delete the entry _ov0.fnm [23 bytes]

Note: I may be wrong in offsets and lengths , so it may require some
trial&error

DIGY



-----Original Message-----
From: Nicolas OLIVERO
Sent: Monday, January 14, 2008 5:22 PM
To: [email protected]
Subject: Cannot find file _ov0.fnm

Hi,



I'm using Lucene.net 2.0.0 and my index file is on shared directory.



All was working fine but today two users add a document at the same time.

Now when I try to search or add a document to the index I'm getting the
following error: "cannot find file _ov0.fnm".



How can I save my index?



Maybe I'm doing something wrong in my code; do I have to put a lock when I
add a document to the index (as my index is on a shared directory)?





Dim writer As IndexWriter

Dim champ As Field



Try

writer = New IndexWriter(REPERTOIRE_INDEX_FULLTEXT, New
Standard.StandardAnalyzer(), False)



Dim leDocument As Document = New Document()



leDocument.Add(New Field("re_id", dossier.entite.getID,
Field.Store.YES, Field.Index.NO))

leDocument.Add(New Field("rp_td_id", CStr(dossier.typedoc.rp_td_id),
Field.Store.YES, Field.Index.NO))

leDocument.Add(New Field("contenu", contenuDocument, Field.Store.YES,
Field.Index.TOKENIZED))



Try

writer.AddDocument(leDocument)

'' at least on windows, some temporary files raise this
exception with an "access denied" message

'' checking if the file can be read doesn't help

Catch ex As FileNotFoundException



End Try



writer.Optimize()

writer.Close()



Catch ex As IOException

The error occurs here ------ > MessageBox.Show("L'index Fulltext
n'existe pas ou est corrompu. Reconstruisez l'index. " + ex.Message, "Erreur
index", MessageBoxButtons.OK, MessageBoxIcon.Error)

Return False

Catch ex As Exception

MessageBox.Show("Erreur lors de l'indexation du document car : " +
ex.Message, "Insertion impossible", MessageBoxButtons.OK,
MessageBoxIcon.Error)

End If

Return False

End Try







Thanks for your help,

Nicolas

unsubscribe

Hi there,
I was wondering if I could have the index in a single file as opposed to a
folder with files in it. Is it possible?


Cheers,
Al

Hi DIGY,

That's very useful information, we see the same problem with our Lucene
2.0.0.4. Just curious if the following exceptions can also be caused by
the same bug?

Error invoking RPC action: System.Reflection.TargetInvocationException:
Exception has been thrown by the target of an invocation. --->
System.IO.IOException: The process cannot access the file 'C:\Documents
and Settings\Jason\caloExpressPersistence\ver-41\lucene\index\segments'
because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess
access, Int32 rights, Boolean useRights, FileShare share, Int32
bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String
msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess
access, FileShare share)
at Lucene.Net.Store.FSIndexInput..ctor(FileInfo path)
at Lucene.Net.Store.FSDirectory.OpenInput(String name)
at Lucene.Net.Index.SegmentInfos.Read(Directory directory)
at Lucene.Net.Index.IndexReader.AnonymousClassWith.DoBody()
at Lucene.Net.Store.Lock.With.Run()
at Lucene.Net.Index.IndexReader.Open(Directory directory, Boolean
closeDirectory)
at Lucene.Net.Search.IndexSearcher..ctor(String path)

In this scenario we have two processes trying to access the same lucene
index, and I think I read somewhere lucene should be process safe?

Thanks for your help!

Min

DIGY wrote:

Hi there,

Just in case anybody would curious, the access exception is gone after
we upgrade to Lucene 2.1.0.3.

Cheers,
Min

Min Yin wrote:

Hi Digy,

Thanks for the help, I upgrade to Lucene 2.1.0.3 and now the lock part works
fine.

For information, I delete the index and rebuild a new one.

Nicolas
-----Message d'origine-----
De : DIGY
Envoyé : lundi 14 janvier 2008 18:03
À : [email protected]
Objet : RE: Cannot find file _ov0.fnm

Hi Nicolas,
I think this is the bug in SimpleFSLockFactory in Lucene.Net 2.0.0
See https://issues.apache.org/jira/browse/LUCENENET-74
It is better to upgrade to 2.1
I don't know if there is a tool to recover the index, but i can propose a
solution
1-After backup, Open the segments???????? file in binary mode (~250 byte)
2-Decrement the file# counter(it is at offset 16[4 bytes])
3-delete the entry _ov0.fnm [23 bytes]

Note: I may be wrong in offsets and lengths , so it may require some
trial&error

DIGY



-----Original Message-----
From: Nicolas OLIVERO
Sent: Monday, January 14, 2008 5:22 PM
To: [email protected]
Subject: Cannot find file _ov0.fnm

Hi,



I'm using Lucene.net 2.0.0 and my index file is on shared directory.



All was working fine but today two users add a document at the same time.

Now when I try to search or add a document to the index I'm getting the
following error: "cannot find file _ov0.fnm".



How can I save my index?



Maybe I'm doing something wrong in my code; do I have to put a lock when I
add a document to the index (as my index is on a shared directory)?





Dim writer As IndexWriter

Dim champ As Field



Try

writer = New IndexWriter(REPERTOIRE_INDEX_FULLTEXT, New
Standard.StandardAnalyzer(), False)



Dim leDocument As Document = New Document()



leDocument.Add(New Field("re_id", dossier.entite.getID,
Field.Store.YES, Field.Index.NO))

leDocument.Add(New Field("rp_td_id", CStr(dossier.typedoc.rp_td_id),
Field.Store.YES, Field.Index.NO))

leDocument.Add(New Field("contenu", contenuDocument, Field.Store.YES,
Field.Index.TOKENIZED))



Try

writer.AddDocument(leDocument)

'' at least on windows, some temporary files raise this
exception with an "access denied" message

'' checking if the file can be read doesn't help

Catch ex As FileNotFoundException



End Try



writer.Optimize()

writer.Close()



Catch ex As IOException

The error occurs here ------ > MessageBox.Show("L'index Fulltext
n'existe pas ou est corrompu. Reconstruisez l'index. " + ex.Message, "Erreur
index", MessageBoxButtons.OK, MessageBoxIcon.Error)

Return False

Catch ex As Exception

MessageBox.Show("Erreur lors de l'indexation du document car : " +
ex.Message, "Insertion impossible", MessageBoxButtons.OK,
MessageBoxIcon.Error)

End If

Return False

End Try







Thanks for your help,

Nicolas