Rust actix-web 3.3.2 deployment hanging

1

I’m trying to deploy an actix-web 3.3.2 web app on Render, but the deployment is stuck in “In progress”, even though the console says Server running at http://127.0.0.1:8089/

I compared my app to the render actix todo example. It seems the major difference is that in the render example, actix-web 1.0.0 is used, and the main function is a vanilla sync function, whereas in the latest version, actix-web 3.3.2, the main function is typically async. See for example this actix-web example. (Edit: Actually the main function is not async. The actix_web::main macro turns main into a sync function. In any case, I still don’t understand why my Render deploy hangs like that.)

Can anyone help me get unstuck here?

(Edit: Maybe I’m setting the host and port incorrectly? For instance, I was able to get this working on Heroku, with the same repo, except I had to set the host to 0.0.0.0 and read the port from an env var.)

2

Could you try to bind your application to 0.0.0.0 like the example? Port should be fine since Render will automatically expose the HTTP port for your web service.

3

If someone comes here with similar problem for Rocket app, solution is to bind address to “0.0.0.0” for example in Rocket.toml file.

As described here:
https://api.rocket.rs/v0.3/rocket/config/

The error message might inform you that the environment name should be “release” not “production”

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