shubhamvishu commented on code in PR #12606:
URL: https://github.com/apache/lucene/pull/12606#discussion_r1341393303


##########
lucene/core/src/java/org/apache/lucene/search/IndexSearcher.java:
##########
@@ -420,13 +418,12 @@ public int count(Query query) throws IOException {
   }
 
   /**
-   * Returns the leaf slices used for concurrent searching, or null if no 
{@code Executor} was
-   * passed to the constructor.
+   * Returns the leaf slices used for concurrent searching
    *
    * @lucene.experimental
    */
   public LeafSlice[] getSlices() {
-    return (executor == null) ? null : leafSlicesSupplier.get();
+    return leafSlicesSupplier.get();

Review Comment:
   Since the method `#slices(List<LeafReaderContext> leaves)` is protected in 
`IndexSearcher`, I thought `#getSlices` could be used by other classes(not 
subclass of `IndexSearcher` and in different package) to get all the slices 
without having to pass `maxDocsPerSlice` and `maxSegmentsPerSlice` to make use 
in concurrency?. But giving it a thought I feel maybe we should 
remove/deprecate `#getSlices` and make `slices(List<LeafReaderContext> leaves)` 
public because `#getSlices` is not doing any extra work other than returning 
those leaf slices(which is obtained from `#slices`)? Let me know what do you 
think?



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