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https://issues.apache.org/jira/browse/LUCENENET-174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680565#action_12680565
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Digy commented on LUCENENET-174:
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If there are no objections, I'll commit the patch
DIGY
> RAMDirectory Not Correctly Serilizing
> -------------------------------------
>
> Key: LUCENENET-174
> URL: https://issues.apache.org/jira/browse/LUCENENET-174
> Project: Lucene.Net
> Issue Type: Bug
> Environment: Lucene.Net version 2.1
> Windows XP 64Bit SP2
> Visual Studio 2008 SP1
> DOTNET 3.5 SP1
> NCache Developer 3.4
> Reporter: Philip Todd
> Priority: Minor
> Attachments: RAMDirectory.patch, Store.zip
>
> Original Estimate: 0.17h
> Remaining Estimate: 0.17h
>
> Greetings. Firstly a big thank you for everyones efforts with Lucene and
> Lucene.Net. Your efforts are much appreciated.
> Background:
> I have created a server application which allows searching across many
> companies. In order to achieve this I have utilized Lucene.Net for indexing
> and searching and NCache from Alachisoft for caching the information
> server-side. As the Lucene index takes a fair amount of time to create - I am
> also caching the RAMDirectory. The caching requires all objects to be
> serialized before storage.
> The issue:
> After retrieving the RAMDirectory from cache (after de-serializing) I
> attempted to create a new IndexWriter object to allow adding more items to
> the index:
> oDirectory = CacheConfig.DeCacheSupplierIndex("SupplierIndex" &
> Supplier.BuyerNo)
> analyzer = New StandardAnalyzer()
> oIndexWriter = New IndexWriter(oDirectory, analyzer, False)
> The attempt to create the IndexWriter resulted in a NullReference exception
> at:
> at Lucene.Net.Store.Directory.MakeLock(String name)
> at Lucene.Net.Index.IndexWriter.Init(Directory d, Analyzer a,
> Boolean create, Boolean closeDir)
> at Lucene.Net.Index.IndexWriter..ctor(Directory d, Analyzer a)
>
> After debugging the Lucene source I discovered the exception was caused by
> the lockFactory definition in the Directory class (Directory.cs line 49)
> having a [NonSerialized] attribute. This caused the lockFactory to be null
> after serialization.
> Fix:
> Removed the [NonSerialized] attribute.
> Added a [Serializable] attribute to SingleInstanceLockFactory
> (SingleInstanceLockFactory.cs line 35)
> Added a [Serializable] attribute to LockFactory (LockFactory.cs line 28)
> This allowed me to proceed. I have not thoroughly tested the changes. I can
> provide the source code if required.
> As we will very likely upgrade to future versions of Lucene - I would like to
> have any fix incorporated into the Lucene source repository. Let me know what
> I should do.
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