why my google app engine has (not always) domain name 'my-project.df.r.appspot.com'?

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Guoliang Li

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Feb 6, 2020, 8:58:38 AM2/6/20

to Google App Engine

I have Google App Engine enabled in a Google Cloud project my-project, the App Engine's URL is my-project.appspot.com by default, which is fine. However, I found sometimes it becomes my-project.df.r.appspot.com (in my App Engine console), which makes my app engine project using a completely different host name internally.

Does anybody know what's going on here? Thanks.

Shinta HATATANI

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Feb 6, 2020, 9:27:28 AM2/6/20

to Google App Engine

I remember the entry in release note which is published at 2019-12-09. It should be related with this behavior.

>December 9, 2019
>App Engine is changing the URLs that you use to send requests to your apps. You can now include a region ID to help Google route your requests more efficiently and reliably. For example, an app can receive requests at https://PROJECT_ID.REGION_ID.r.appspot.com. This new URL is optional for existing apps, and will soon be required for all new apps.