Fix parameter value for calling data.advanceExact (#44205)

While the code works perfectly well for a single segment, it returns the wrong values for multiple segments. E.g. If we have 500 docs in one segment and if we want to get the doc id = 280 then data.advanceExact(topDocs.scoreDocs[i].doc) works fine. If we have two segments, say, with first segment having docs 1-200 and the second segment having docs 201-500, then 280 is fetched from the second segment but is actually 480. Subtracting the docBase (280-200) takes us to the correct document which is 80 in the second segment and actually 280.

Author: maarab7

plugins/examples/rescore/src/main/java/org/elasticsearch/example/rescore/ExampleRescoreBuilder.java

@@ -189,7 +189,7 @@ public TopDocs rescore(TopDocs topDocs, IndexSearcher searcher, RescoreContext r
                         }
                         data = ((AtomicNumericFieldData) fd).getDoubleValues();
                     }
-                    if (false == data.advanceExact(topDocs.scoreDocs[i].doc)) {
+                    if (false == data.advanceExact(topDocs.scoreDocs[i].doc - leaf.docBase)) {
                         throw new IllegalArgumentException("document [" + topDocs.scoreDocs[i].doc
                                 + "] does not have the field [" + context.factorField.getFieldName() + "]");
                     }