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

Upgrade windows, regions, and instance types that may be affected:
August 03, 2023 22:00 Beijing time - August 04, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public]
August 08, 2023 22:00 Beijing time - August 09, 2023 07:00 Beijing time [Zhangjiakou, Chengdu, Qingdao, Hohhot]
August 10, 2023 22:00 Beijing time - August 11, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public, Zhangjiakou, Chengdu, Qingdao, Hohhot]
August 15, 2023 22:00 Beijing time - August 16, 2023 07:00 Beijing time [Singapore, Hong Kong, Tokyo, Sydney, Kuala Lumpur, Jakarta, Manila, Mumbai, Frankfurt, Silicon Valley, Virginia, Dubai, London]
August 17, 2023 22:00 Beijing time - August 18, 2023 07:00 Beijing time [Hangzhou, Shanghai, Shenzhen, Beijing, Public]
August 22, 2023 22:00 Beijing time - August 23, 2023 07:00 Beijing time [Zhangjiakou, Chengdu, Qingdao, Hohhot]
August 24, 2023 22:00 Beijing time - August 25, 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.