Applicable services: Anti-DDoS Pro of the previous version
Time: (UTC+8) 00:00:00 to 06:00:00 on December 27, 2019
Description: Anti-DDoS Pro instances of the previous version that are deployed in a data center of China Unicom in North China is upgraded.
Impact: During the upgrade, your services are not affected. In some cases, the origin server is configured with strong security verification policies and the IP addresses need to be authenticated again. This breaks the TCP-based connections eight times. Transient disconnection errors have little impact on services that use short-lived connections and persistent connections that can be automatically reestablished. Make sure that your services support automatic reconnection to ensure fault tolerance.
Customer service: We apologize for any inconvenience caused. If you require any further assistance, we recommend that you contact customer service.