gautamworah96 commented on a change in pull request #1733:
URL: https://github.com/apache/lucene-solr/pull/1733#discussion_r469727743



##########
File path: 
lucene/facet/src/java/org/apache/lucene/facet/taxonomy/directory/DirectoryTaxonomyReader.java
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@@ -323,8 +323,10 @@ public FacetLabel getPath(int ordinal) throws IOException {
       }
     }
     
-    Document doc = indexReader.document(ordinal);
-    FacetLabel ret = new 
FacetLabel(FacetsConfig.stringToPath(doc.get(Consts.FULL)));
+    boolean found = MultiDocValues.getBinaryValues(indexReader, 
Consts.FULL).advanceExact(catIDInteger);

Review comment:
       Thank you for looking at it so closely (and helping in debugging).
   
   The new PR has the following changes:
   1. Use `ordinal`  instead of `catIDInteger` (IntelliJ says that boxing is 
anyways not needed, perhaps we can remove?)
   2. Use the correct `values` instance that has advanced to the correct `docId`
   3. Use `ReaderUtil` to get to the `leaf` and then use `LeafReader` instead 
of using the higher level `MultiDocValues` call
   
   TEST:
   `ant test` in the `lucene-solr/lucene/facets` directory (passes successfully)
   `ant precommit`
   
   I've not added any new tests because this PR changes a low level 
implementation detail and the current tests already cover this
   
   The next step is to run lucene benchmarks!
   




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