If you try to start JBoss from Eclipse, by default Eclipse has a 50 second limit which is really too short, especially if you are starting JBoss 5.X releases.
To overcome this limit you have two options:
- Double click on the server icon (In the Servers tab). In the next panel choose an appropriate timeout for your server.
Start JBoss AS from the JBoss AS Server View. In order to do so, you have to install JBoss tools on your Eclipse.