Help Center> API Gateway> Dedicated API Gateway User Guide (Paris Region)> FAQs> API Calling> Why Am I Seeing the Message "No backend available"?

Updated on 2023-12-20 GMT+08:00

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Why Am I Seeing the Message "No backend available"?

Check whether the backend service is accessible, and modify the backend service if it is inaccessible.
Check the ECS security group configurations of the backend service and verify that the required port has been enabled.
Check whether the backend service address is a public IP address. If yes, enable outbound access on the Gateways > Access Console > Gateway Information page.
Check whether ACL configurations of the VPC restrict the communication between the API gateway and the subnet where the backend service is located.
If you use a VPC channel, check whether the service port, health check port, and backend servers of the VPC channel have been correctly configured.

Parent topic: API Calling

Previous topic: What Should I Do If "The API does not exist or has not been published in the environment." Is Displayed?

Next topic: What Are the Possible Causes If the Message "Backend unavailable" or "Backend timeout" Is Displayed?

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