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https://issues.apache.org/jira/browse/LUCENE-1949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera closed LUCENE-1949.
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Resolution: Won't Fix
FilterManager is used only by 'remote' classes, which are deprecated in 3x and
removed from trunk. I'm think FilterManager can be deprecated as well. We have
CachingWrapperFilter which caches Filters and is much better.
> FilterManager uses unsafe keys for its filter cache
> ---------------------------------------------------
>
> Key: LUCENE-1949
> URL: https://issues.apache.org/jira/browse/LUCENE-1949
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 2.9
> Reporter: Aaron McKee
> Priority: Minor
>
> re: FilterManager.getFilter(Filter filter)
> FilterManager is using the filter's hash code as the key to its filter cache,
> however hash codes are intrinsically not guaranteed to be distinct; different
> filters may hash to the same value. Although the chance of a conflict is
> hopefully low, given reasonable implementations of hashCode, it's certainly
> not impossible. When a conflict does occur, an unintended filter may be
> returned.
> I'm unaware to what extent this class is actively being used, but noticed the
> issue during a code browse and thought I'd at least mention it.
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