[Alibaba Cloud][AliwareMQ for MQTT][upgrade notice]

Upgrade windows, regions, and instance types that may be affected:
December 07, 2023 22:00 Beijing time - December 08, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public]
December 12, 2023 22:00 Beijing time - December 13, 2023 07:00 Beijing time [Zhangjiakou, Chengdu, Qingdao, Hohhot]
December 14, 2023 22:00 Beijing time - December 15, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public, Zhangjiakou, Chengdu, Qingdao, Hohhot]
December 19, 2023 22:00 Beijing time - December 20, 2023 07:00 Beijing time [Singapore, Hong Kong, Tokyo, Sydney, Kuala Lumpur, Jakarta, Manila, Mumbai, Frankfurt, Silicon Valley, Virginia, Dubai, London]
December 21, 2023 22:00 Beijing time - December 22, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public]
December 26, 2023 22:00 Beijing time - December 27, 2023 07:00 Beijing time [Zhangjiakou, Chengdu, Qingdao, Hohhot]
December 28, 2023 22:00 Beijing time - December 29, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public, Zhangjiakou, Chengdu, Qingdao, Hohhot]

Upgrade Impact:
During the upgrade, the MQTT console and each service node in the cluster may experience a second-level flash (the flash time is positively related to the cluster scale). The client application needs to set automatic reconnection to avoid affecting the business.
During the upgrade period, there may be a small number of failures in message sending, and the application should implement a retry mechanism for disconnection failures; at the same time, there may be message delays. For administrative operations on the console, please avoid maintenance windows.
Sorry for the inconvenience caused to you, if you have any questions, please feel free to contact us through the ticket.