fix

@@ -406,7 +406,7 @@ public class ProductIndexBaseService {
             for (Map<String, Object> productMap : productList) {
                 //全球购跳过
                 if ("Y".equals(MapUtils.getString(productMap, "is_global"))) {
-                    productMap.put("promotion_tag", null);
+                    productMap.put("promotion_tag", new JSONArray());
                     results.add(productMap);
                     continue;
                 }