Query: match_all query (also in query_string: *:*) is very slow

Author: kimchy

modules/elasticsearch/src/main/java/org/elasticsearch/common/lucene/docset/AllDocSet.java

@@ -66,15 +66,15 @@ private AllDocIdSetIterator(int maxDoc) {
             if (++doc < maxDoc) {
                 return doc;
             }
-            return NO_MORE_DOCS;
+            return doc = NO_MORE_DOCS;
         }
 
         @Override public int advance(int target) throws IOException {
             doc = target;
             if (doc < maxDoc) {
                 return doc;
             }
-            return NO_MORE_DOCS;
+            return doc = NO_MORE_DOCS;
         }
     }
 }