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https://issues.apache.org/jira/browse/LUCENE-6909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15027261#comment-15027261
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Sanne Grinovero commented on LUCENE-6909:
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Thanks!
> Improve concurrency for FacetsConfig
> ------------------------------------
>
> Key: LUCENE-6909
> URL: https://issues.apache.org/jira/browse/LUCENE-6909
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/other
> Affects Versions: 5.3
> Reporter: Sanne Grinovero
> Priority: Trivial
> Fix For: Trunk, 5.5
>
> Attachments:
> 0001-LUCENE-6909-Allow-efficient-concurrent-usage-of-a-Fa.patch
>
>
> The design of {{org.apache.lucene.facet.FacetsConfig}} encourages reuse of a
> single instance across multiple threads, yet the current synchronization
> model is too strict as it doesn't allow for concurrent read operations.
> I'll attach a trivial patch which removes the contention point.
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