Requests to my node server deployed on GAE ends in DNS_PROBE_FINISHED_NXDOMAIN on a particular ISP (Reliance JIO in India). The same app works fine on any other network . If deployed on Heroku or on AWS, again it works as expected.
Edit: Forgot to mention, I have tried all devices, iOS, Android, Mac and Win, zeroed down on this ISP. All other combinations work (i.e any other ISP and any other device and any browser).
The combination of Reliance Jio's network and Google Cloud (Google App Engine) does not work.
What to do here? What could be the issue? Is there something on my end that I have not configured?