Application secret from env variable does not work about playframework

[mkurz]

And I checked the relevant environment variables with sbt show run / envVars and the returned map was empty.

This is expected behaviour, see my explanation in #10972 (comment). Maybe you misunderstood what envVars is used for.

Anyway, you say that when you remove the (second) line play.http.secret.key=${?APPLICATION_SECRET} from your config, then your application is working. Seems like you do have a APPLICATION_SECRET environment variable defined somehow, somewhere (maybe /etc/environment? Or in one of the .bash* files in the home directory?). Can you please check what env | grep -i APPLICATION_SECRET on the used Ubuntu machine outputs?

[cornelius-mund]

I found the issue.

APPLICATION_SECRET was not set but there was a strange character in that line after the variable that apparantly caused the issue. (see diff below)

Thanks for your quick response anyway.

-play.http.secret.key=${?APPLICATION_SECRET}
+play.http.secret.key=${?APPLICATION_SECRET}

[mkurz]

Perfect, glad you found the problem!

Thanks for your quick response anyway.

You are welcome! Have a nice time coding with Play 😉