javanna commented on code in PR #13542:
URL: https://github.com/apache/lucene/pull/13542#discussion_r1686444817
##########
lucene/core/src/java/org/apache/lucene/search/TotalHitCountCollectorManager.java:
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@@ -28,17 +31,77 @@
*/
public class TotalHitCountCollectorManager
implements CollectorManager<TotalHitCountCollector, Integer> {
+
+ /**
+ * Internal state shared across the different collectors that this collector
manager creates. It
+ * tracks leaves seen as an argument of {@link
Collector#getLeafCollector(LeafReaderContext)}
+ * calls, to ensure correctness: if the first partition of a segment early
terminates, count has
+ * been already retrieved for the entire segment hence subsequent partitions
of the same segment
+ * should also early terminate. If the first partition of a segment computes
hit counts,
+ * subsequent partitions of the same segment should do the same, to prevent
their counts from
+ * being retrieve from {@link LRUQueryCache} (which returns counts for the
entire segment)
+ */
+ private final Map<LeafReaderContext, Boolean> seenContexts = new HashMap<>();
Review Comment:
@jpountz would you like to review the changes to
`TotalHitCountCollectorManager`? They replace previous changes to
`IndexSearcher#search` and `LRUQueryCache` around count handling from cache and
early termination.
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