[LUCENE-6909] Improve concurrency for FacetsConfig

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 5.3
• Fix Version/s: 5.5, 6.0
• Component/s: core/other
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Sanne Grinovero
• Created: 25/Nov/15 00:12
• Updated: 28/Aug/22 14:46
• Resolved: 25/Nov/15 16:36

Description

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.