fix

Author: gf2121

lucene/core/src/java/org/apache/lucene/search/Weight.java

@@ -233,6 +233,7 @@ protected static class DefaultBulkScorer extends BulkScorer {
     private final TwoPhaseIterator twoPhase;
     private final ScoreMode scoreMode;
     private DocAndScoreBuffer buffer;
+    private SimpleScorable scorable;
 
     /** Sole constructor. */
     public DefaultBulkScorer(Scorer scorer) {
@@ -308,8 +309,10 @@ private int batchScore(LeafCollector collector, Bits acceptDocs, int min, int ma
       if (buffer == null) {
         buffer = new DocAndScoreBuffer();
       }
+      if (scorable == null) {
+        scorable = new SimpleScorable();
+      }
 
-      SimpleScorable scorable = new SimpleScorable();
       collector.setScorer(scorable);
       scorer.setMinCompetitiveScore(scorable.minCompetitiveScore);