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https://issues.apache.org/jira/browse/LUCENE-4857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer resolved LUCENE-4857.
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Resolution: Fixed
Assignee: Simon Willnauer
> StemmerOverrideFilter should not copy the stem override dictionary in it's
> ctor.
> --------------------------------------------------------------------------------
>
> Key: LUCENE-4857
> URL: https://issues.apache.org/jira/browse/LUCENE-4857
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Affects Versions: 4.0, 4.1, 4.2
> Reporter: Simon Willnauer
> Assignee: Simon Willnauer
> Priority: Minor
> Fix For: 5.0, 4.2.1
>
> Attachments: LUCENE-4857.patch
>
>
> Currently the dictionary is cloned each time the token filter is created
> which is a serious bottleneck if you use this filter with large dictionaries
> and can also lead to OOMs if lots of those filters sit in ThreadLocals and
> new threads are added etc. I think cloning the map should be done in the
> analyzer (which all of our analyzers do btw. but this is the only TF that
> does that) no need to really copy that map.
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