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Posted to user@lucenenet.apache.org by Min Yin <yi...@AI.SRI.COM> on 2008/01/16 23:38:08 UTC
Re: Cannot find file _ov0.fnm
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 Nicolas,
>
>
>> I'm using Lucene.net 2.0.0 and my index file is on shared directory.
>>
> 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
>
>
>> How can I save my index?
>>
> 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 [mailto:no@img-solutions.com]
> Sent: Monday, January 14, 2008 5:22 PM
> To: lucene-net-user@incubator.apache.org
> 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
>
>
>
>
Re: Cannot find file _ov0.fnm
Posted by Min Yin <yi...@AI.SRI.COM>.
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,
>
> 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 Nicolas,
>>
>>
>>> I'm using Lucene.net 2.0.0 and my index file is on shared directory.
>>>
>> 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
>>
>>
>>> How can I save my index?
>>>
>> 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 [mailto:no@img-solutions.com] Sent: Monday,
>> January 14, 2008 5:22 PM
>> To: lucene-net-user@incubator.apache.org
>> 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
>>
>>
>>
>>