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Su, Xiaomeng b8dbeabef4 dli_umn_20250929 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
2025-11-26 09:25:57 +00:00

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

Possible Causes

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

Solution

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.

    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.