(Quick Reference)

2.8 Running and Debugging an Application

Version: 3.2.3

2.8 Running and Debugging an Application

Grails applications can be run with the built in Tomcat server using the run-app command which will load a server on port 8080 by default:

grails run-app

You can specify a different port by using the server.port argument:

grails -Dserver.port=8090 run-app

Note that it is better to start up the application in interactive mode since a container restart is much quicker:

$ grails
grails> run-app
| Server running. Browse to http://localhost:8080/helloworld
| Application loaded in interactive mode. Type 'stop-app' to shutdown.
| Downloading: plugins-list.xml
grails> stop-app
| Stopping Grails server
grails> run-app
| Server running. Browse to http://localhost:8080/helloworld
| Application loaded in interactive mode. Type 'stop-app' to shutdown.
| Downloading: plugins-list.xml

You can debug a grails app by simply right-clicking on the Application.groovy class in your IDE and choosing the appropriate action (since Grails 3).

Alternatively, you can run your app with the following command and then attach a remote debugger to it.

grails run-app --debug-jvm

More information on the run-app command can be found in the reference guide.