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https://issues.apache.org/jira/browse/LUCENE-776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-776.
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Resolution: Won't Fix
Fix Version/s: 2.1
Just updated the javadoc for FSDirectory.DIRECTORIES.
> Use WeakHashMap instead of Hashtable in FSDirectory
> ---------------------------------------------------
>
> Key: LUCENE-776
> URL: https://issues.apache.org/jira/browse/LUCENE-776
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Nicolas Lalevée
> Assigned To: Michael McCandless
> Priority: Trivial
> Fix For: 2.1
>
>
> I was just reading the FSDirectory java code, then I found this :
> /** This cache of directories ensures that there is a unique Directory
> * instance per path, so that synchronization on the Directory can be used
> to
> * synchronize access between readers and writers.
> *
> * This should be a WeakHashMap, so that entries can be GC'd, but that would
> * require Java 1.2. Instead we use refcounts...
> */
> private static final Hashtable DIRECTORIES = new Hashtable();
> Since Lucene is now requiring at least 1.2 (for ThreadLocal for instance,
> which is using BTW some WeakHashMap), maybe it is time to change ?
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