# 常见问题

- [H2数据库异常修复](/course/chang-jian-cuo-wu/h2-shu-ju-ku-yi-chang-xiu-fu.md)
- [O2OA平台异常](/course/chang-jian-cuo-wu/o2oa-ping-tai-yi-chang.md)
- [阿里云ECS服务器的端口启用](/course/chang-jian-cuo-wu/o2oa-ping-tai-yi-chang/e-li-yun-ecs-fu-wu-qi-de-duan-kou-qi-yong.md): O2OA成功启动后，有可能无法正常访问服务器，需要在ECS进行安全策略配置，开放端口：80、20020、20030
- [IOS移动办公无法收到验证码](/course/chang-jian-cuo-wu/o2oa-ping-tai-yi-chang/ios-yi-dong-ban-gong-wu-fa-shou-dao-yan-zheng-ma.md): iphone7 with IOS10.2.1无法收到服务器绑定的验证码。
- [集群配置](/course/chang-jian-cuo-wu/o2oa-ping-tai-yi-chang/ji-qun-pei-zhi.md)
- [数据导出或者导入时发生OOM异常](/course/chang-jian-cuo-wu/shu-ju-dao-chu-huo-zhe-dao-ru-shi-fa-sheng-oom-yi-chang.md)
- [服务器错误](/course/chang-jian-cuo-wu/fu-wu-qi-cuo-wu.md)