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https://issues.apache.org/jira/browse/LUCENENET-106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12665278#action_12665278
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Digy commented on LUCENENET-106:
--------------------------------

Recursive "WeakDictionaryEnumerator.MoveNext" can be costly in some rare cases, 
I would prefer a loop there.
Anyway, This code passes my all tests and has also the best performance.
Thanks Eyal.

PS: I don't know much about licensing issues, but I think, it would be good to 
add a apache license to your code.

DIGY.

> Lucene.NET (Revision: 603121) is leaking memory
> -----------------------------------------------
>
>                 Key: LUCENENET-106
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-106
>             Project: Lucene.Net
>          Issue Type: Bug
>         Environment: .NET 2.0
>            Reporter: Anton K.
>            Assignee: Digy
>            Priority: Critical
>         Attachments: DIGY-FieldCacheImpl.patch, Digy.rar, 
> luceneSrc_memUsage.patch, Paches for v2.3.1.rar, WeakHashTable v2.patch, 
> WeakHashTable v2.patch, WeakHashTable+FieldCacheImpl.rar, 
> WeakHashTable_ep.zip, WeakHashTable_ep_v2.zip, WeakHashTable_tj.zip, 
> WeakReferences.rar
>
>
> readerCache Hashtable field (see FieldCacheImpl.cs) never releases some hash 
> items that have closed IndexReader object as a key. So a lot of Term 
> instances are never released.
> Java version of Lucene uses WeakHashMap and therefore doesn't have this 
> problem.
> This bug can be reproduced only when Sort functionality used during search. 
> See following link for additional information.
> http://www.gossamer-threads.com/lists/lucene/java-user/55681
> Steps to reproduce:
> 1)Create index
> 2) Modify index by IndexWiter; Close IndexWriter
> 3) Use IndexSearcher for searching with Sort; Close InexSearcher
> 4) Go to step 2
> You'll get OutOfMemoryException after some time of running this algorithm.

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