Cannot get -Dhttp.port to work in 2.9.0-RC3

[nilsweinander]

I have just created a new Play project, using 2.9.0-RC3. In previous versions I have used (2.3 and 2.7), I have been able to change the port the app runs on when I start it from IntelliJ, by specifying

-Dhttp.port=XXXX

in JVM options. In the new 2.9 project this has no effect,. Neither has setting

play.server.http.port=XXXX

in application.conf, Play uses port 9000 regardless. What am I doing wrong here?

[PromanSEW]

If you start app from IDEA, you likely do it in dev mode. In this case you should set port in build.sbt:

PlayKeys.devSettings += ("play.server.http.port", "XXXX")

[nilsweinander]

Thanks! That did the trick.