If you want to see the server logs and messages printed to System.out on your command prompt screen, you can start the server in verbose mode. This makes it easy to do simple debugging using print statements, without having to view the server.log file every time.
When the server is in verbose mode, messages are logged to the console or terminal window in addition to the log file. In addition, pressing Ctrl-C stops the server and pressing Ctrl-\ prints a thread dump. To start the server in verbose mode, use the --verbose option as follows:
asadmin start-domain --verbose [domain-name]
You can enable verbose mode even when the application server is started without the --verbose option. This is useful if you start the application server from the Windows Start Menu or if you want to make sure that verbose mode is always turned on.
You can set the server to automatically start up in verbose mode using the Administration Console. For details, see the Sun Java System Application Server Platform Edition 8.1 2005Q2 Update 2 Administration Guide.