Backend Service Fails to Be Invoked

Cause Analysis

The possible causes are as follows:

• The backend service address is incorrect.
• The timeout duration is incorrect.

  If a backend service fails to return a response within the configured timeout duration, APIC displays a message indicating that the backend service fails to be invoked.

• The security group of the Elastic Cloud Server (ECS) on which the backend service is deployed cannot be accessed.

Solution

• Change the backend service address in the API definition.
• Increase the backend timeout duration in the API definition.
• Ensure that the inbound and outbound ports and protocols configured for services are correct.