What Should I Do If a Database Client Problem Causes a Connection Failure?

Identify a DDS DB instance connection failure caused by a client problem from the following aspects.

1. ECS Security Policy

   In Windows, check whether the DDS port is enabled in the Windows security policy.

   In Linux, run the iptables command to check whether the DDS port is enabled in firewall settings.

2. Application Configuration

   Check whether the IP address, port parameter, and Java database connectivity (JDBC) are configured correctly.