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