Index: lucene/facet/src/test/org/apache/lucene/facet/search/TestDemoFacets.java
===================================================================
--- lucene/facet/src/test/org/apache/lucene/facet/search/TestDemoFacets.java	(revision 1515994)
+++ lucene/facet/src/test/org/apache/lucene/facet/search/TestDemoFacets.java	(working copy)
@@ -29,6 +29,7 @@
 import org.apache.lucene.analysis.MockAnalyzer;
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field;
+import org.apache.lucene.document.TextField;
 import org.apache.lucene.facet.FacetTestCase;
 import org.apache.lucene.facet.FacetTestUtils;
 import org.apache.lucene.facet.codecs.facet45.Facet45Codec;
@@ -42,10 +43,16 @@
 import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader;
 import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter;
 import org.apache.lucene.facet.util.PrintTaxonomyStats;
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.index.Term;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.search.similarities.DefaultSimilarity;
 import org.apache.lucene.search.similarities.PerFieldSimilarityWrapper;
 import org.apache.lucene.search.similarities.Similarity;
@@ -309,4 +316,67 @@
 
     IOUtils.close(searcher.getIndexReader(), taxoReader, dir, taxoDir);
   }
+
+  // LUCENE-5184
+  public void testSumTotalCounts() throws Exception {
+
+    Directory index = newDirectory();
+    Directory taxoIndex = newDirectory();
+
+    IndexWriterConfig config = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
+
+    FacetIndexingParams fip = new FacetIndexingParams(new CategoryListParams() {
+        @Override
+        public OrdinalPolicy getOrdinalPolicy(String dim) {
+          // NO_PARENTS also works:
+          return OrdinalPolicy.ALL_PARENTS;
+        }
+      });
+
+    IndexWriter w = new IndexWriter(index, config);
+    TaxonomyWriter taxoWriter = new DirectoryTaxonomyWriter(taxoIndex);
+    FacetFields facetFields = new FacetFields(taxoWriter, fip);
+
+    // add a root document
+    Document doc = new Document();
+    doc.add(new TextField("title", "All Books", Field.Store.YES));
+    ArrayList<CategoryPath> categoryPaths = new ArrayList<CategoryPath>();		
+    categoryPaths.add(new CategoryPath("book"));
+    facetFields.addFields(doc, categoryPaths );
+    w.addDocument(doc);
+
+    // add a leaf document
+    doc = new Document();
+    doc.add(new TextField("title", "Lucene in Action", Field.Store.YES));
+    categoryPaths = new ArrayList<CategoryPath>();		
+    categoryPaths.add(new CategoryPath("book|comp", '|'));
+    facetFields.addFields(doc, categoryPaths );
+    w.addDocument(doc);
+
+    w.close();
+    taxoWriter.close();
+
+    // 2. query
+    IndexReader reader = DirectoryReader.open(index);
+    IndexSearcher searcher = new IndexSearcher(reader);
+    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoIndex);
+
+    Query query = new TermQuery(new Term("title", "lucene"));
+
+    FacetSearchParams facetSearchParams = new FacetSearchParams(fip, new CountFacetRequest(new CategoryPath("book", '|'), 10));
+    FacetsCollector facetsCollector = FacetsCollector.create(facetSearchParams, reader, taxoReader);
+    searcher.search(query, facetsCollector);
+
+    FacetResultNode facetNode = facetsCollector.getFacetResults().get(0).getFacetResultNode();
+		
+    int subTotal = 0;
+    for (FacetResultNode subNode: facetNode.subResults) {
+      subTotal += subNode.value;
+    }
+    assertEquals(subTotal, (int) facetNode.value);
+    taxoReader.close();
+    reader.close();
+    index.close();
+    taxoIndex.close();
+  }
 }