同步语句处理

applications/document/document-server/src/main/java/com/usoftchina/saas/document/service/impl/ProductServiceImpl.java

@@ -526,7 +526,7 @@ public class ProductServiceImpl extends CommonBaseServiceImpl<ProductMapper, Pro
      * @Author: chenwei
      * @Date: 2018/10/26
      */
-    private String pushMaxnubmer(String code, Long id) {
+    private synchronized String pushMaxnubmer(String code, Long id) {
         if (null == code) {
             throw new BizException(BizExceptionCode.NULL_CODE);
         }