What Should I Do If an RDS Database Problem Causes a Connection Failure?
Check whether any of the following problems occurred on the RDS DB instance.
- The RDS DB instance is not properly connected.
Solution: Check the connection. If you connect to the RDS DB instance through a private network, the ECS and DB instance must be in the same VPC and the DB instance can be accessed only through an ECS in the same VPC. If you connect to the RDS DB instance through a public network, the ECS and DB instance can be in different VPCs.
- The maximum number of connections has been reached.
Solution: Use RDS resource monitoring to check if the CPU usage and the number of current connections are abnormal. If either of them has reached the maximum, reboot, disconnect, or scale up the class of the RDS DB instance.
- The DB instance is abnormal. For example, the RDS DB instance fails to be rebooted, the system is faulty, or the instance or table is locked.
Solution: Reboot the RDS DB instance to see if the problem is resolved. If the problem persists, contact post-sales technical support.
Database Connection FAQs
- What Should I Do If I Can't Connect to My RDS DB Instance?
- Can an External Server Access the RDS Database?
- What Do I Do If the Number of RDS Database Connections Reaches the Upper Limit?
- What Is the Maximum Number of Connections to an RDS DB Instance?
- What Should I Do If an ECS Cannot Connect to an RDS DB Instance Through a Private Network?
- What Should I Do If a Database Client Problem Causes a Connection Failure?
- What Should I Do If an RDS Database Problem Causes a Connection Failure?
- How Do My Applications Access an RDS DB Instance in a VPC?
- Do Applications Need to Support Reconnecting to the RDS DB Instance Automatically?
- Why Can't I Ping My EIP After It Is Bound to a DB Instance?
- How Can I Obtain the IP Address of an Application?
- What Should I Do If an RDS for SQL Server DB Instance Failed to Be Connected?
- Can I Access an RDS DB Instance Over an Intranet Connection Across Regions?
- Is an SSL Connection to a DB Instance Interrupted After a Primary/Standby Switchover or Failover?
- Will My Access Be Restricted by Bandwidth When I Connect to My Instance from an ECS over a Private Network?
- Does RDS Support SSL Connections?
- Why Did the New Password Not Take Effect After I Reset the Administrator Password?
- Will I Be Logged Out If the Connection to RDS for SQL Server Instances Times Out?
- How Do I Set the Encoding Format of the MySQL 8.0 Character Set?
- What Should I Do If the ECS and RDS Are Deployed in Different VPCs and They Cannot Communicate with Each Other?
- How Do I View All IP Addresses Connected to a Database?
- Can I Access Standby RDS DB Instances?
- How Do I Check the Connections to an RDS for MySQL Instance?
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