Connection Timeout (SDK for Node.js)

Problem: If a "connect ETIMEDOUT" error occurred when calling an API, the possible cause was that the service address (endpoint) was incorrect or the network was disconnected.

Solution:

1. Check whether the service address was left blank or invalid.
2. Check the network connection.
3. Check whether the server had returned any exceptions and if so, contact the server-side O&M team.