dsmiley commented on a change in pull request #1343: LUCENE-8103: Use two-phase 
iteration in Query- and DoubleValuesSource
URL: https://github.com/apache/lucene-solr/pull/1343#discussion_r392379518
 
 

 ##########
 File path: 
lucene/core/src/java/org/apache/lucene/search/DoubleValuesSource.java
 ##########
 @@ -608,22 +608,25 @@ public DoubleValues getValues(LeafReaderContext ctx, 
DoubleValues scores) throws
       return new DoubleValues() {
         private final TwoPhaseIterator tpi = scorer.twoPhaseIterator();
         private final DocIdSetIterator disi = (tpi == null) ? 
scorer.iterator() : tpi.approximation();
-
-        private int scorerDoc = -1;
-        private boolean thisDocMatches = false;
+        private Boolean thisDocMatches = false;
 
         @Override
         public double doubleValue() throws IOException {
-          return thisDocMatches ? scorer.score() : Double.NaN;
+          return (thisDocMatches != null && thisDocMatches) ? scorer.score() : 
Double.NaN;
 
 Review comment:
   Just compare with Boolean.TRUE; one condition

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