Grails Offline mode with Maven dependency resolution

Developing with Grails 2.3.5, the maven dependency resolution is almost perfectly integrated.
It depends on the aether core engine to resolve dependencies.

A problem arises when working on offline mode, without any way to check for artifacts repositories.
The application in development runs and gets stuck on "|Configuring classpath" step... for minutes until the application finally starts!
Unfortunately, the configuration grails.offline.mode=true doesn't work with maven resolution, only with the legacy "ivy" dependency resolution.

So here is the trick, after trying loads of configurations failing (-Dsun.net.client.defaultReadTimeout, -Dsun.net.client.defaultConnectTimeout), I ended up adding the following parameters to the JVM :

-Daether.connector.connectTimeout=500 -Daether.connector.requestTimeout=500

Configuring faster timeouts, I can't even notice a latency during application boot :)

Productivity is back !