To continuously enhance the performance and stability of our cloud product services, Alibaba Cloud will soon be upgrading the network infrastructure architecture of some data centers. This change will affect some of your cloud database resources in the certain regions. Please pay attention to the following details:
•Affected Products: ApsaraDB RDS, PolarDB, PolarDB-X, ApsaraDB for Redis, Tair, ApsaraDB for MongoDB, ApsaraDB for HBase, Lindorm, AnalyticDB, ApsaraDB for ClickHouse, etc.
•Affected Regions: Germany (Frankfurt) Zone A, Singapore Zone A, Singapore Zone B, UK (London) Zone A
•Affected Time:
Singapore Time
June 5, 2024: 00:00 AM to 06:00 AM (GMT+8)
June 7, 2024: 00:00 AM to 06:00 AM (GMT+8)
London Time
June 4, 2024: 01:00 AM to 05:00 AM (BST)
June 6, 2024: 01:00 AM to 05:00 AM (BST)
Berlin Time
June 4, 2024: 02:00 AM to 06:00 AM (CEST)
June 6, 2024: 02:00 AM to 06:00 AM (CEST)
•Impact Description:
The existing long connections of involved instances will not be affected, with the ability to automatically resume. However, new connections may experience multiple network fluctuations within 30 seconds. It's crucial to equip your applications with a connection retry mechanism and closely monitor any business changes throughout the upgrade period.
•Reference Documents:
ApsaraDB RDS Reconnection Mechanism > (https://www.alibabacloud.com/help/rds/apsaradb-rds-for-mysql/use-an-application-to-connect-to-an-apsaradb-rds-for-mysql-instance)
ApsaraDB for Redis Reconnection Mechanism > (https://www.alibabacloud.com/help/redis/use-cases/retry-mechanisms-for-redis-clients)
ApsaraDB for MongoDB Reconnection Mechanism > (https://www.alibabacloud.com/help/mongodb/getting-started/connect-to-an-apsaradb-for-mongodb-standalone-instance-by-using-program-code)
please feel free to contact us via a ticket if you have any questions.

Thank you for your understanding and support. We sincerely apologize for any inconvenience this may cause.