Merge remote-tracking branch 'origin/master'

lucene/CHANGES.txt

@@ -73,6 +73,9 @@ Optimizations
 * LUCENE-7235: LRUQueryCache should not take a lock for segments that it will
   not cache on anyway. (Adrien Grand)
 
+* LUCENE-7238: Explicitly disable the query cache in MemoryIndex#createSearcher.
+  (Adrien Grand)
+
 Bug Fixes
 
 * LUCENE-7127: Fix corner case bugs in GeoPointDistanceQuery. (Robert Muir)

lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java

@@ -666,6 +666,7 @@ public class MemoryIndex {
     MemoryIndexReader reader = new MemoryIndexReader();
     IndexSearcher searcher = new IndexSearcher(reader); // ensures no auto-close !!
     searcher.setSimilarity(normSimilarity);
+    searcher.setQueryCache(null);
     return searcher;
   }