benwtrent commented on code in PR #13306:
URL: https://github.com/apache/lucene/pull/13306#discussion_r1578336720
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lucene/core/src/java/org/apache/lucene/search/LRUQueryCache.java:
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@@ -265,7 +269,6 @@ boolean requiresEviction() {
}
CacheAndCount get(Query key, IndexReader.CacheHelper cacheHelper) {
- assert lock.isHeldByCurrentThread();
assert key instanceof BoostQuery == false;
assert key instanceof ConstantScoreQuery == false;
final IndexReader.CacheKey readerKey = cacheHelper.getKey();
Review Comment:
So, `Collections.synchronizedMap` should be used, or locking manually around
this particular `get`.
And that means now we are locking on read again, which might mean all
performance gains go away.
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