Getting "getaddrinfo ENOTFOUND errno -3008" when GCP cloud run calls GCP api gateway

Question

In GCP, we have nodejs/docker based microservice m1. This is behind api gateway ag1. We have another nodejs/docker based microservice m2 which needs to invoke ag1 using http client.

We are able to invoke ag1 from postman successfully. However, when m2 tries to invoke ag1, an error is returned stating below: "getaddrinfo ENOTFOUND errno -3008"

Please help