FilterManager uses unsafe keys for its filter cache
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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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