atris commented on a change in pull request #815: LUCENE-8213: Introduce 
Asynchronous Caching in LRUQueryCache
URL: https://github.com/apache/lucene-solr/pull/815#discussion_r326577739
 
 

 ##########
 File path: lucene/core/src/java/org/apache/lucene/search/LRUQueryCache.java
 ##########
 @@ -448,13 +459,42 @@ void assertConsistent() {
     }
   }
 
+  // pkg-private for testing
+  // return the list of queries being loaded asynchronously
+  List<Query> inFlightQueries() {
+    lock.lock();
+    try {
+      return new ArrayList<>(inFlightAsyncLoadQueries);
 
 Review comment:
   Not all places which access `inFlightAsyncLoadQueries` take a lock -- the 
main being `cacheAsynchronously`

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