How Do I Resolve the "communication link failure" Error When Using a Newly Created Datasource Connection That Appears to Be Activated?

The network connectivity is abnormal. Check whether the security group is correctly selected and whether the VPC is correctly configured.

Example: When you create an RDS datasource connection, the system displays the error message Communication link failure.

1. Delete the original datasource connection and create a new one. When you create a connection, ensure that the selected Security Group, VPC, Subnet, and Destination Address are the same as those in RDS.
   Note

   Select a correct Service Type. In this example, select RDS.

2. Check the configurations of VPC.

   If the error message is still displayed after you create a datasource connection according to Step 1, check the VPC configuration.