update

@@ -108,7 +108,7 @@ public class PromotionProductMqListener extends AbstractMqListener implements Ch
 	private void updateProductIndex(Integer productSkn, long currentTimeMillis,String key){
 		String promotionIds=promotionProductService.getPromotionIds(productSkn);
 		Integer productId=productService.selectProductIdBySkn(productSkn);
-		 logger.info("[func=updateProductIndex][step=saveToES][key={}][productId={}][promotionIds={}]", key,productId, promotionIds);
+		logger.info("[func=updateProductIndex][key={}][productId={}][promotionIds={}]", key,productId, promotionIds);
 		Map<String, Object> indexData = new HashMap<String, Object>();
         indexData.put("productId", productId);
         indexData.put("promotionIds", promotionIds);

@@ -26,7 +26,7 @@ public class PromotionProductService {
 			result.append(pp.getPromotionId()).append(",");
          }
 		if(result.length()<1){
-			return null;
+			return "";
 		}
 		return result.substring(0,result.length()-1);
 	}